Quantum's types are organized into a type tree rooted at Object .  Below, Quantum's type tree is broken out into separate subtrees for clarity.

Visual
  UIElement
    FrameworkElement
      Control
        Calendar
        ContentControl
          ButtonBase
            ToggleButton
              CheckBox
              RadioButton
          Frame
          HeaderedContentControl
            Expander
            GroupBox
          Label
          ListBoxItem
            ComboBoxItem
          ScrollViewer
          ToolTip
          Window
        DatePicker
        DocumentViewerBase
          DocumentViewer
        ItemsControl
          HeaderedItemsControl
            MenuItem
            ToolBar
          MenuBase
            ContextMenu
            Menu
          Selector
            ComboBox
            ListBox
              ListView
            MultiSelector
              DataGrid
            TabControl
          StatusBar
          TreeView
        PasswordBox
        RangeBase
          ProgressBar
          ScrollBar
          Slider
        Separator
        TextBoxBase
          RichTextBox
          TextBox
        Thumb
          GridSplitter
      Decorator
        Border
        Viewbox
      HwndHost
        ActiveXHost
          WebBrowser
      Image
      MediaElement
      Page
      Panel
        Canvas
        DockPanel
        Grid
        StackPanel
          ToolBarPanel
        WrapPanel
      System.Windows.Shapes.Shape
        Ellipse
        System.Windows.Shapes.Path
        Polygon
        Polyline
        Rectangle
      TextBlock
      ToolBarTray