diff --git a/app/ui/MainWindow.ui b/app/ui/MainWindow.ui
index 79fbee1..61ed24e 100644
--- a/app/ui/MainWindow.ui
+++ b/app/ui/MainWindow.ui
@@ -132,7 +132,7 @@
      <x>0</x>
      <y>0</y>
      <width>800</width>
-     <height>28</height>
+     <height>21</height>
     </rect>
    </property>
   </widget>
diff --git a/gui/include/Catalogue/CatalogueEventsWidget.h b/gui/include/Catalogue/CatalogueEventsWidget.h
new file mode 100644
index 0000000..721001e
--- /dev/null
+++ b/gui/include/Catalogue/CatalogueEventsWidget.h
@@ -0,0 +1,21 @@
+#ifndef CATALOGUEEVENTSWIDGET_H
+#define CATALOGUEEVENTSWIDGET_H
+
+#include <QWidget>
+
+namespace Ui {
+class CatalogueEventsWidget;
+}
+
+class CatalogueEventsWidget : public QWidget {
+    Q_OBJECT
+
+public:
+    explicit CatalogueEventsWidget(QWidget *parent = 0);
+    ~CatalogueEventsWidget();
+
+private:
+    Ui::CatalogueEventsWidget *ui;
+};
+
+#endif // CATALOGUEEVENTSWIDGET_H
diff --git a/gui/include/Catalogue/CatalogueInspectorWidget.h b/gui/include/Catalogue/CatalogueInspectorWidget.h
new file mode 100644
index 0000000..d08f208
--- /dev/null
+++ b/gui/include/Catalogue/CatalogueInspectorWidget.h
@@ -0,0 +1,21 @@
+#ifndef CATALOGUEINSPECTORWIDGET_H
+#define CATALOGUEINSPECTORWIDGET_H
+
+#include <QWidget>
+
+namespace Ui {
+class CatalogueInspectorWidget;
+}
+
+class CatalogueInspectorWidget : public QWidget {
+    Q_OBJECT
+
+public:
+    explicit CatalogueInspectorWidget(QWidget *parent = 0);
+    ~CatalogueInspectorWidget();
+
+private:
+    Ui::CatalogueInspectorWidget *ui;
+};
+
+#endif // CATALOGUEINSPECTORWIDGET_H
diff --git a/gui/include/Catalogue/CatalogueSideBarWidget.h b/gui/include/Catalogue/CatalogueSideBarWidget.h
new file mode 100644
index 0000000..c4d8b53
--- /dev/null
+++ b/gui/include/Catalogue/CatalogueSideBarWidget.h
@@ -0,0 +1,21 @@
+#ifndef CATALOGUESIDEBARWIDGET_H
+#define CATALOGUESIDEBARWIDGET_H
+
+#include <QWidget>
+
+namespace Ui {
+class CatalogueSideBarWidget;
+}
+
+class CatalogueSideBarWidget : public QWidget {
+    Q_OBJECT
+
+public:
+    explicit CatalogueSideBarWidget(QWidget *parent = 0);
+    ~CatalogueSideBarWidget();
+
+private:
+    Ui::CatalogueSideBarWidget *ui;
+};
+
+#endif // CATALOGUESIDEBARWIDGET_H
diff --git a/gui/meson.build b/gui/meson.build
index ee7f16c..55e755d 100644
--- a/gui/meson.build
+++ b/gui/meson.build
@@ -20,7 +20,10 @@ gui_moc_headers = [
   'include/Visualization/ColorScaleEditor.h',
   'include/Actions/SelectionZoneAction.h',
   'include/Visualization/VisualizationMultiZoneSelectionDialog.h',
-  'include/Catalogue/CatalogueExplorer.h'
+  'include/Catalogue/CatalogueExplorer.h',
+  'include/Catalogue/CatalogueEventsWidget.h',
+  'include/Catalogue/CatalogueSideBarWidget.h',
+  'include/Catalogue/CatalogueInspectorWidget.h'
 ]
 
 gui_ui_files = [
@@ -38,7 +41,10 @@ gui_ui_files = [
   'ui/Visualization/VisualizationZoneWidget.ui',
   'ui/Visualization/ColorScaleEditor.ui',
   'ui/Visualization/VisualizationMultiZoneSelectionDialog.ui',
-  'ui/Catalogue/CatalogueExplorer.ui'
+  'ui/Catalogue/CatalogueExplorer.ui',
+  'ui/Catalogue/CatalogueEventsWidget.ui',
+  'ui/Catalogue/CatalogueSideBarWidget.ui',
+  'ui/Catalogue/CatalogueInspectorWidget.ui'
 ]
 
 gui_qresources = ['resources/sqpguiresources.qrc']
@@ -94,7 +100,10 @@ gui_sources = [
   'src/Actions/ActionsGuiController.cpp',
   'src/Visualization/VisualizationActionManager.cpp',
   'src/Visualization/VisualizationMultiZoneSelectionDialog.cpp',
-  'src/Catalogue/CatalogueExplorer.cpp'
+  'src/Catalogue/CatalogueExplorer.cpp',
+  'src/Catalogue/CatalogueEventsWidget.cpp',
+  'src/Catalogue/CatalogueSideBarWidget.cpp',
+  'src/Catalogue/CatalogueInspectorWidget.cpp'
 ]
 
 gui_inc = include_directories(['include'])
diff --git a/gui/src/Catalogue/CatalogueEventsWidget.cpp b/gui/src/Catalogue/CatalogueEventsWidget.cpp
new file mode 100644
index 0000000..0ee7227
--- /dev/null
+++ b/gui/src/Catalogue/CatalogueEventsWidget.cpp
@@ -0,0 +1,13 @@
+#include "Catalogue/CatalogueEventsWidget.h"
+#include "ui_CatalogueEventsWidget.h"
+
+CatalogueEventsWidget::CatalogueEventsWidget(QWidget *parent)
+        : QWidget(parent), ui(new Ui::CatalogueEventsWidget)
+{
+    ui->setupUi(this);
+}
+
+CatalogueEventsWidget::~CatalogueEventsWidget()
+{
+    delete ui;
+}
diff --git a/gui/src/Catalogue/CatalogueInspectorWidget.cpp b/gui/src/Catalogue/CatalogueInspectorWidget.cpp
new file mode 100644
index 0000000..1e3ee05
--- /dev/null
+++ b/gui/src/Catalogue/CatalogueInspectorWidget.cpp
@@ -0,0 +1,13 @@
+#include "Catalogue/CatalogueInspectorWidget.h"
+#include "ui_CatalogueInspectorWidget.h"
+
+CatalogueInspectorWidget::CatalogueInspectorWidget(QWidget *parent)
+        : QWidget(parent), ui(new Ui::CatalogueInspectorWidget)
+{
+    ui->setupUi(this);
+}
+
+CatalogueInspectorWidget::~CatalogueInspectorWidget()
+{
+    delete ui;
+}
diff --git a/gui/src/Catalogue/CatalogueSideBarWidget.cpp b/gui/src/Catalogue/CatalogueSideBarWidget.cpp
new file mode 100644
index 0000000..0be4394
--- /dev/null
+++ b/gui/src/Catalogue/CatalogueSideBarWidget.cpp
@@ -0,0 +1,13 @@
+#include "Catalogue/CatalogueSideBarWidget.h"
+#include "ui_CatalogueSideBarWidget.h"
+
+CatalogueSideBarWidget::CatalogueSideBarWidget(QWidget *parent)
+        : QWidget(parent), ui(new Ui::CatalogueSideBarWidget)
+{
+    ui->setupUi(this);
+}
+
+CatalogueSideBarWidget::~CatalogueSideBarWidget()
+{
+    delete ui;
+}
diff --git a/gui/ui/Catalogue/CatalogueEventsWidget.ui b/gui/ui/Catalogue/CatalogueEventsWidget.ui
new file mode 100644
index 0000000..51335c3
--- /dev/null
+++ b/gui/ui/Catalogue/CatalogueEventsWidget.ui
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CatalogueEventsWidget</class>
+ <widget class="QWidget" name="CatalogueEventsWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/gui/ui/Catalogue/CatalogueExplorer.ui b/gui/ui/Catalogue/CatalogueExplorer.ui
index 3a12e78..70fe42d 100644
--- a/gui/ui/Catalogue/CatalogueExplorer.ui
+++ b/gui/ui/Catalogue/CatalogueExplorer.ui
@@ -6,14 +6,51 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>403</width>
-    <height>300</height>
+    <width>775</width>
+    <height>512</height>
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Dialog</string>
+   <string>Catalogue Explorer</string>
   </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QSplitter" name="horizontalSplitter">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <widget class="CatalogueSideBarWidget" name="catalogues" native="true"/>
+     <widget class="QSplitter" name="verticalSplitter">
+      <property name="orientation">
+       <enum>Qt::Vertical</enum>
+      </property>
+      <widget class="CatalogueEventsWidget" name="events" native="true"/>
+      <widget class="CatalogueInspectorWidget" name="inspector" native="true"/>
+     </widget>
+    </widget>
+   </item>
+  </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>CatalogueSideBarWidget</class>
+   <extends>QWidget</extends>
+   <header>Catalogue/CatalogueSideBarWidget.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>CatalogueEventsWidget</class>
+   <extends>QWidget</extends>
+   <header>Catalogue/CatalogueEventsWidget.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>CatalogueInspectorWidget</class>
+   <extends>QWidget</extends>
+   <header>Catalogue/CatalogueInspectorWidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>
diff --git a/gui/ui/Catalogue/CatalogueInspectorWidget.ui b/gui/ui/Catalogue/CatalogueInspectorWidget.ui
new file mode 100644
index 0000000..9a27c23
--- /dev/null
+++ b/gui/ui/Catalogue/CatalogueInspectorWidget.ui
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CatalogueInspectorWidget</class>
+ <widget class="QWidget" name="CatalogueInspectorWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/gui/ui/Catalogue/CatalogueSideBarWidget.ui b/gui/ui/Catalogue/CatalogueSideBarWidget.ui
new file mode 100644
index 0000000..4fd27b2
--- /dev/null
+++ b/gui/ui/Catalogue/CatalogueSideBarWidget.ui
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CatalogueSideBarWidget</class>
+ <widget class="QWidget" name="CatalogueSideBarWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>