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.

Freezable
  Animatable
    Brush
      GradientBrush
        LinearGradientBrush
        RadialGradientBrush
      SolidColorBrush
    DashStyle
    Drawing
      DrawingGroup
      GeometryDrawing
    GeneralTransform
      Transform
        RotateTransform
        ScaleTransform
        TransformGroup
        TranslateTransform
    Geometry
      EllipseGeometry
      GeometryGroup
      LineGeometry
      PathGeometry
      RectangleGeometry
    GradientStop
    ImageSource
      BitmapSource
        BitmapFrame
      DrawingImage
    PathFigure
    PathFigureCollection
    PathSegment
      PolyLineSegment
    PathSegmentCollection
    Pen
    Timeline
      TimelineGroup
        ParallelTimeline
          Storyboard
  InputBinding
    KeyBinding
  PointCollection