diff --git a/Control/AthenaBaseComps/AthenaBaseComps/AthHistogramFilterAlgorithm.h b/Control/AthenaBaseComps/AthenaBaseComps/AthHistogramFilterAlgorithm.h
deleted file mode 100644
index e2e8faf1c5ba864a9c6f18625854e9d95c821390..0000000000000000000000000000000000000000
--- a/Control/AthenaBaseComps/AthenaBaseComps/AthHistogramFilterAlgorithm.h
+++ /dev/null
@@ -1,115 +0,0 @@
-///////////////////////// -*- C++ -*- /////////////////////////////
-
-/*
-  Copyright (C) 2002-2017, 2019 CERN for the benefit of the ATLAS collaboration
-*/
-
-/// @class AthHistogramFilterAlgorithm.h 
-/// Header file for AthHistogramAlgorithm
-/// @author: Karsten Koeneke (karsten.koeneke@cern.ch)
-/////////////////////////////////////////////////////////////////// 
-#ifndef ATHENABASECOMPS_ATHHISTOGRAMFILTERALGORITHM_H
-#define ATHENABASECOMPS_ATHHISTOGRAMFILTERALGORITHM_H 1
-
-// STL includes
-#include <string>
-
-// Framework includes
-#include "AthenaBaseComps/AthFilterAlgorithm.h"
-#include "AthenaBaseComps/AthHistogramming.h"
-#include "GaudiKernel/ServiceHandle.h"
-
-
-// Some needed forward declarations
-class ITHistSvc;
-
-
-
-
-class AthHistogramFilterAlgorithm
-  : public ::AthFilterAlgorithm,
-    public ::AthHistogramming
-{ 
-
-  /////////////////////////////////////////////////////////////////// 
-  // Public methods: 
-  /////////////////////////////////////////////////////////////////// 
-public: 
-
-  /// Constructor with parameters: 
-  AthHistogramFilterAlgorithm( const std::string& name, ISvcLocator* pSvcLocator );
-
-  /// Destructor: 
-  virtual ~AthHistogramFilterAlgorithm(); 
-
-  /** Initialization method invoked by the framework. This method is responsible
-   *  for any bookkeeping of initialization required by the framework itself.
-   *  It will in turn invoke the initialize() method of the derived algorithm,
-   *  and of any sub-algorithms which it creates.
-   */
-  virtual StatusCode sysInitialize();
-
-
-
-  /////////////////////////////////////////////////////////////////// 
-  // Const methods: 
-  ///////////////////////////////////////////////////////////////////
-
-  /** @brief The standard @c THistSvc (for writing histograms and TTrees 
-   *  and more to a root file)
-   * Returns (kind of) a pointer to the @c THistSvc
-   */
-  const ServiceHandle<ITHistSvc>& histSvc() const;
-
-
-
-  /////////////////////////////////////////////////////////////////// 
-  // Private methods: 
-  /////////////////////////////////////////////////////////////////// 
-private:
-  /// Default constructor: 
-  ///AthHistogramFilterAlgorithm();
-
-  
-
-  /////////////////////////////////////////////////////////////////// 
-  // Private data: 
-  /////////////////////////////////////////////////////////////////// 
-private: 
-
-  /// a handle on the Hist/TTree registration service
-  ServiceHandle<ITHistSvc> m_histSvc;
-
-
-  /// Name of the ROOT output stream (file)
-  std::string m_prefix;
-
-  /// Name of the ROOT directory
-  std::string m_rootDir;
-
-  /// The prefix for the histogram THx name
-  std::string m_histNamePrefix;
-
-  /// The postfix for the histogram THx name
-  std::string m_histNamePostfix;
-
-  /// The prefix for the histogram THx title
-  std::string m_histTitlePrefix;
-
-  /// The postfix for the histogram THx title
-  std::string m_histTitlePostfix;
-
-
-
-}; 
-
-// I/O operators
-//////////////////////
-
-// For the THistSvc
-inline const ServiceHandle<ITHistSvc>& AthHistogramFilterAlgorithm::histSvc() const 
-{
-  return m_histSvc;
-}
-
-#endif //> !ATHENABASECOMPS_ATHHISTOGRAMFILTERALGORITHM_H
diff --git a/Control/AthenaBaseComps/AthenaBaseComps/AthHistogramTool.h b/Control/AthenaBaseComps/AthenaBaseComps/AthHistogramTool.h
deleted file mode 100644
index 84e091ae716b6dfe0e2595ff62e34bfe26483a89..0000000000000000000000000000000000000000
--- a/Control/AthenaBaseComps/AthenaBaseComps/AthHistogramTool.h
+++ /dev/null
@@ -1,113 +0,0 @@
-///////////////////////// -*- C++ -*- /////////////////////////////
-
-/*
-  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
-*/
-
-// AthHistogramTool.h 
-// Header file for class AthHistogramTool
-// Author: Karsten Koeneke
-/////////////////////////////////////////////////////////////////// 
-#ifndef ATHENABASECOMPS_ATHHISTOGRAMTOOL_H
-#define ATHENABASECOMPS_ATHHISTOGRAMTOOL_H 1
-
-// STL includes
-#include <string>
-
-// Framework includes
-#include "AthenaBaseComps/AthAlgTool.h"
-#include "AthenaBaseComps/AthHistogramming.h"
-#include "GaudiKernel/ServiceHandle.h"
-
-
-// Some needed forward declarations
-class ITHistSvc;
-
-
-
-class AthHistogramTool
-  : public ::AthAlgTool,
-    public ::AthHistogramming
-{ 
-
-  /////////////////////////////////////////////////////////////////// 
-  // Public methods: 
-  /////////////////////////////////////////////////////////////////// 
-public: 
-
-  /// Constructor with parameters: 
-  AthHistogramTool( const std::string& type,
-                    const std::string& name, 
-                    const IInterface* parent );
-
-
-  /// Destructor:
-  virtual ~AthHistogramTool();
-
-  /////////////////////////////////////////////////////////////////// 
-  // Const methods: 
-  ///////////////////////////////////////////////////////////////////
-
-  /** @brief The standard @c THistSvc (for writing histograms and TTrees 
-   *  and more to a root file)
-   * Returns (kind of) a pointer to the @c THistSvc
-   */
-  const ServiceHandle<ITHistSvc>& histSvc() const;
-
-
-  /////////////////////////////////////////////////////////////////// 
-  // Non-const methods: 
-  /////////////////////////////////////////////////////////////////// 
-
-  /** Initialization method invoked by the framework. This method is responsible
-   *  for any bookkeeping of initialization required by the framework itself.
-   *  It will in turn invoke the initialize() method of the derived algorithm,
-   *  and of any sub-algorithms which it creates.
-   */
-  virtual StatusCode sysInitialize();
-
-
-
-  /////////////////////////////////////////////////////////////////// 
-  // Private data: 
-  /////////////////////////////////////////////////////////////////// 
-protected:
-  
-  /// Pointer to the THistSvc (event store by default)
-  ServiceHandle<ITHistSvc> m_histSvc;
-
-
-  /// Name of the ROOT output stream (file)
-  std::string m_prefix;
-
-  /// Name of the ROOT directory
-  std::string m_rootDir;
-
-  /// The prefix for the histogram THx name
-  std::string m_histNamePrefix;
-
-  /// The postfix for the histogram THx name
-  std::string m_histNamePostfix;
-
-  /// The prefix for the histogram THx title
-  std::string m_histTitlePrefix;
-
-  /// The postfix for the histogram THx title
-  std::string m_histTitlePostfix;
-
-
-}; 
-
-
-/////////////////////////////////////////////////////////////////// 
-// Inline methods: 
-/////////////////////////////////////////////////////////////////// 
-
-// For the THistSvc
-inline const ServiceHandle<ITHistSvc>& AthHistogramTool::histSvc() const 
-{
-  return m_histSvc;
-}
-
-
-#endif //> !ATHENABASECOMPS_ATHHISTOGRAMTOOL_H
diff --git a/Control/AthenaBaseComps/src/AthHistogramFilterAlgorithm.cxx b/Control/AthenaBaseComps/src/AthHistogramFilterAlgorithm.cxx
deleted file mode 100644
index a3298420a3ff94b00db862a8a33c1941f3258060..0000000000000000000000000000000000000000
--- a/Control/AthenaBaseComps/src/AthHistogramFilterAlgorithm.cxx
+++ /dev/null
@@ -1,114 +0,0 @@
-///////////////////////// -*- C++ -*- /////////////////////////////
-
-/*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
-*/
-
-/// @class AthHistogramFilterAlgorithm.h 
-/// Header file for class AthHistogramAlgorithm
-/// @author: Karsten Koeneke (karsten.koeneke@cern.ch)
-/////////////////////////////////////////////////////////////////// 
-
-// This class' header file
-#include "AthenaBaseComps/AthHistogramFilterAlgorithm.h"
-
-// STL includes
-#include <string>
-
-// Framework includes
-#include "Gaudi/Property.h"
-#include "GaudiKernel/ITHistSvc.h"
-
-
-
-/////////////////////////////////////////////////////////////////// 
-// Public methods: 
-/////////////////////////////////////////////////////////////////// 
-
-// Constructors
-////////////////
-AthHistogramFilterAlgorithm::AthHistogramFilterAlgorithm( const std::string& name, 
-                                                          ISvcLocator* pSvcLocator ) : 
-  ::AthFilterAlgorithm( name, pSvcLocator ),
-  ::AthHistogramming( name ),
-  m_histSvc ( "THistSvc/THistSvc", name )
-{
-  //
-  // Property declaration
-  // 
-  // The histogram service
-  declareProperty("THistSvc",
-                  m_histSvc = ServiceHandle<ITHistSvc>("THistSvc/THistSvc", name),
-                  "Handle to a THistSvc instance: it will be used to write "
-                  "ROOT objects to ROOT files" );
-
-  //declareProperty("THistService",      m_histSvc, "The THistSvc" );
-  declareProperty("RootStreamName",    m_prefix  = "/ANALYSIS", "Name of the output ROOT stream (file) that the THistSvc uses");
-  declareProperty("RootDirName",       m_rootDir = "",
-                  "Name of the ROOT directory inside the ROOT file where the histograms will go");
-
-  declareProperty( "HistNamePrefix",   m_histNamePrefix  = "", "The prefix for the histogram THx name" );
-  declareProperty( "HistNamePostfix",  m_histNamePostfix = "", "The postfix for the histogram THx name" );
-
-  declareProperty( "HistTitlePrefix",  m_histTitlePrefix  = "", "The prefix for the histogram THx title" );
-  declareProperty( "HistTitlePostfix", m_histTitlePostfix = "", "The postfix for the histogram THx title" );
-}
-
-
-
-
-// Destructor
-///////////////
-AthHistogramFilterAlgorithm::~AthHistogramFilterAlgorithm()
-{
-  ATH_MSG_DEBUG ("Calling destructor");
-}
-
-
-
-/** Initialization method invoked by the framework. This method is responsible
- *  for any bookkeeping of initialization required by the framework itself.
- *  It will in turn invoke the initialize() method of the derived algorithm,
- *  and of any sub-algorithms which it creates.
- */
-StatusCode AthHistogramFilterAlgorithm::sysInitialize()
-{
-  // ---- stolen from GaudiKernel/Algorithm::sysInitialize -------
-  // Bypass the initialization if the algorithm
-  // has already been initialized.
-  if ( Gaudi::StateMachine::INITIALIZED <= FSMState() ) return StatusCode::SUCCESS;
-
-  // Set the Algorithm's properties
-  ATH_CHECK(setProperties());
-
-  // Bypass the initialization if the algorithm is disabled.
-  // Need to do this after setProperties.
-  if ( !isEnabled( ) ) return StatusCode::SUCCESS;
-  
-  // ---- stolen from GaudiKernel/Algorithm::sysInitialize ------- END ---
-
-
-  // Get the THistSvc
-  ATH_CHECK ( histSvc().retrieve() );
-
-  // Configure the underlying AthHistogramming helper
-  ATH_CHECK ( AthHistogramming::configAthHistogramming( histSvc(),
-                                                        m_prefix,          m_rootDir, 
-                                                        m_histNamePrefix,  m_histNamePostfix,
-                                                        m_histTitlePrefix, m_histTitlePostfix ) );
-  
-  // Print some setup information into the log file
-  ATH_MSG_DEBUG ("Initializing " << name() << "...");
-  ATH_MSG_DEBUG (" using THistService     = " << m_histSvc );
-  ATH_MSG_DEBUG (" using RootStreamName   = " << m_prefix );
-  ATH_MSG_DEBUG (" using RootDirName      = " << m_rootDir );
-  ATH_MSG_DEBUG (" using HistNamePrefix   = " << m_histNamePrefix );
-  ATH_MSG_DEBUG (" using HistNamePostfix  = " << m_histNamePostfix );
-  ATH_MSG_DEBUG (" using HistTitlePrefix  = " << m_histTitlePrefix );
-  ATH_MSG_DEBUG (" using HistTitlePostfix = " << m_histTitlePostfix );
-
-
-  // re-direct to base class...
-  return AthFilterAlgorithm::sysInitialize();
-}
-
diff --git a/Control/AthenaBaseComps/src/AthHistogramTool.cxx b/Control/AthenaBaseComps/src/AthHistogramTool.cxx
deleted file mode 100644
index 707641e5233e9e98534471c6065a3d4e7a9726b0..0000000000000000000000000000000000000000
--- a/Control/AthenaBaseComps/src/AthHistogramTool.cxx
+++ /dev/null
@@ -1,114 +0,0 @@
-///////////////////////// -*- C++ -*- /////////////////////////////
-
-/*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
-*/
-
-// AthHistogramTool.cxx 
-// Implementation file for class AthHistogramTool
-// Author: Karsten Koeneke
-/////////////////////////////////////////////////////////////////// 
-
-// This class' header includes
-#include "AthenaBaseComps/AthHistogramTool.h"
-
-// STL includes
-#include <string>
-
-// Framework includes
-#include "GaudiKernel/MsgStream.h"
-#include "GaudiKernel/ITHistSvc.h"
-
-
-
-
-/////////////////////////////////////////////////////////////////// 
-// Public methods: 
-/////////////////////////////////////////////////////////////////// 
-
-// Constructors
-////////////////
-AthHistogramTool::AthHistogramTool( const std::string& type, 
-                                    const std::string& name,
-                                    const IInterface* parent ) :
-  ::AthAlgTool( type, name, parent ),
-  ::AthHistogramming( name ),
-  m_histSvc ( "THistSvc/THistSvc", name )
-{
-  // Properties go here
-  declareProperty("THistSvc",
-                  m_histSvc = ServiceHandle<ITHistSvc>("THistSvc/THistSvc", name),
-                  "Handle to a THistSvc instance: it will be used to write "
-                  "ROOT objects to ROOT files" );
-
-  declareProperty("RootStreamName",    m_prefix  = "/ANALYSIS", "Name of the output ROOT stream (file) that the THistSvc uses");
-  declareProperty("RootDirName",       m_rootDir = "",
-                  "Name of the ROOT directory inside the ROOT file where the histograms will go");
-
-  declareProperty( "HistNamePrefix",   m_histNamePrefix  = "", "The prefix for the histogram THx name" );
-  declareProperty( "HistNamePostfix",  m_histNamePostfix = "", "The postfix for the histogram THx name" );
-
-  declareProperty( "HistTitlePrefix",  m_histTitlePrefix  = "", "The prefix for the histogram THx title" );
-  declareProperty( "HistTitlePostfix", m_histTitlePostfix = "", "The postfix for the histogram THx title" );
-}
-
-
-
-
-// Destructor
-///////////////
-AthHistogramTool::~AthHistogramTool()
-{
-  ATH_MSG_DEBUG ("Calling destructor");
-}
-
-
-/////////////////////////////////////////////////////////////////// 
-// Non-const methods: 
-/////////////////////////////////////////////////////////////////// 
-
-
-//=============================================================================
-// Athena initialize method
-//=============================================================================
-StatusCode AthHistogramTool::sysInitialize()
-{
-  /*
-  // ---- stolen from GaudiKernel/Algorithm::sysInitialize -------
-  // Bypass the initialization if the algorithm
-  // has already been initialized.
-  if ( Gaudi::StateMachine::INITIALIZED <= FSMState() ) return StatusCode::SUCCESS;
-
-  // Set the Algorithm's properties
-  ATH_CHECK(setProperties());
-
-  // Bypass the initialization if the algorithm is disabled.
-  // Need to do this after setProperties.
-  if ( !isEnabled( ) ) return StatusCode::SUCCESS;
-  
-  // ---- stolen from GaudiKernel/Algorithm::sysInitialize ------- END ---
-  */
-
-  // Get the THistSvc
-  ATH_CHECK ( histSvc().retrieve() );
-
-  // Configure the underlying AthHistogramming helper
-  ATH_CHECK ( AthHistogramming::configAthHistogramming( histSvc(),
-                                                        m_prefix,          m_rootDir, 
-                                                        m_histNamePrefix,  m_histNamePostfix,
-                                                        m_histTitlePrefix, m_histTitlePostfix ) );
-  
-  // Print some setup information into the log file
-  ATH_MSG_DEBUG ("Initializing " << name() << "...");
-  ATH_MSG_DEBUG (" using THistService     = " << m_histSvc );
-  ATH_MSG_DEBUG (" using RootStreamName   = " << m_prefix );
-  ATH_MSG_DEBUG (" using RootDirName      = " << m_rootDir );
-  ATH_MSG_DEBUG (" using HistNamePrefix   = " << m_histNamePrefix );
-  ATH_MSG_DEBUG (" using HistNamePostfix  = " << m_histNamePostfix );
-  ATH_MSG_DEBUG (" using HistTitlePrefix  = " << m_histTitlePrefix );
-  ATH_MSG_DEBUG (" using HistTitlePostfix = " << m_histTitlePostfix );
-
-
-  // re-direct to base class...
-  return AthAlgTool::sysInitialize();
-}