diff --git a/gtk/glade/README.glade b/gtk/glade/README.glade
deleted file mode 100644
index 4790294a07..0000000000
--- a/gtk/glade/README.glade
+++ /dev/null
@@ -1,17 +0,0 @@
-The catalog in this directory defines some widgets that are private
-to GTK and is needed to edit .ui files defining composite classes
-in GTK.
-
-In order to edit any composite classes in GTK, startup Glade
-in the following way, example:
-
-    cd /path/to/gtk/
-    GLADE_CATALOG_SEARCH_PATH=`pwd`/gtk/glade glade gtk/ui/gtkfilechooserwidget.ui
-
-Documentation for updating this catalog can be found here:
-    https://developer.gnome.org/gladeui/stable/
-
-Note also that when including private GTK widgets as components, it is
-important to call g_type_ensure () to register the type explicitly
-before calling gtk_container_init_template(), otherwise GtkBuilder will
-not be able to properly load the type.
diff --git a/gtk/glade/gtk-private-widgets.xml b/gtk/glade/gtk-private-widgets.xml
deleted file mode 100644
index 7e2ca72b81..0000000000
--- a/gtk/glade/gtk-private-widgets.xml
+++ /dev/null
@@ -1,33 +0,0 @@
-<glade-catalog name="gtkprivate"
-	       version="3.96"
-	       depends="gtk4"
-	       library="gtk-4">
-  <init-function>gtk_glade_catalog_init</init-function>
-
-  <glade-widget-classes>
-    <!-- base GTK private widgets -->
-    <glade-widget-class name="GtkPathBar" generic-name="pathbar" title="Path Bar" icon-name="widget-gtk-toolbar"/>
-    <glade-widget-class name="GtkColorEditor" generic-name="coloreditor" title="Color Editor" icon-name="widget-gtk-colorselection"/>
-    <glade-widget-class name="GtkColorSwatch" generic-name="colorswatch" title="Color Swatch" icon-name="widget-gtk-colorselection"/>
-    <glade-widget-class name="GtkColorPlane" generic-name="colorplane" title="Color Plane" icon-name="widget-gtk-colorselection"/>
-    <glade-widget-class name="GtkColorScale" generic-name="colorscale" title="Color Scale" icon-name="widget-gtk-colorselection"/>
-
-    <!-- gtkunixprint private widgets -->
-    <glade-widget-class name="GtkPrinterOptionWidget" generic-name="printeroptionwidget" title="Printer Option Widget"
-			icon-name="widget-gtk-frame">
-      <properties>
-	<property id="orientation" default="GTK_ORIENTATION_HORIZONTAL"/>
-	<property id="size" disabled="True"/>
-      </properties>
-    </glade-widget-class>
-  </glade-widget-classes>
-  
-  <glade-widget-group name="gtk-private" title="Private GTK Classes">
-    <glade-widget-class-ref name="GtkPathBar"/>
-    <glade-widget-class-ref name="GtkColorEditor"/>
-    <glade-widget-class-ref name="GtkColorSwatch"/>
-    <glade-widget-class-ref name="GtkColorPlane"/>
-    <glade-widget-class-ref name="GtkColorScale"/>
-    <glade-widget-class-ref name="GtkPrinterOptionWidget"/>
-  </glade-widget-group>
-</glade-catalog>
diff --git a/gtk/gtkgladecatalog.c b/gtk/gtkgladecatalog.c
deleted file mode 100644
index a44a120767..0000000000
--- a/gtk/gtkgladecatalog.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/* gtkgladecatalog.c
- *
- * Copyright (C) 2013 Openismus GmbH
- *
- * Authors:
- *      Tristan Van Berkom <tristanvb@openismus.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-#include "config.h"
-
-#include "gtkpathbar.h"
-#include "gtkplacesviewprivate.h"
-#include "gtkcolorswatchprivate.h"
-#include "gtkcolorplaneprivate.h"
-#include "gtkcolorscaleprivate.h"
-#include "gtkcoloreditorprivate.h"
-
-#ifdef G_OS_UNIX
-#  include "gtkprinteroptionwidget.h"
-#endif
-
-_GDK_EXTERN
-void gtk_glade_catalog_init (const char *catalog_name);
-
-/* This function is referred to in gtk/glade/gtk-private-widgets.xml
- * and is used to ensure the private types for use in Glade while
- * editing UI files that define GTK’s various composite widget classes.
- */
-void
-gtk_glade_catalog_init (const char *catalog_name)
-{
-  g_type_ensure (GTK_TYPE_PATH_BAR);
-  g_type_ensure (GTK_TYPE_PLACES_VIEW);
-  g_type_ensure (GTK_TYPE_COLOR_SWATCH);
-  g_type_ensure (GTK_TYPE_COLOR_PLANE);
-  g_type_ensure (GTK_TYPE_COLOR_SCALE);
-  g_type_ensure (GTK_TYPE_COLOR_EDITOR);
-
-#ifdef G_OS_UNIX
-  g_type_ensure (GTK_TYPE_PRINTER_OPTION_WIDGET);
-#endif
-}
diff --git a/gtk/meson.build b/gtk/meson.build
index f1fd696297..3d46552a40 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -110,7 +110,6 @@ gtk_private_sources = files([
   'gtkfilechooserutils.c',
   'gtkfilesystemmodel.c',
   'gtkgizmo.c',
-  'gtkgladecatalog.c',
   'gtkhsla.c',
   'gtkiconcache.c',
   'tools/gtkiconcachevalidator.c',