AutoCAD Architecture Styles downloads

Several free Styles are available to download at Autodesk site.

Doors

Windows

Endcaps

AEC Polygon

Curtain Walls

Walls

Multi-View Block Definitions

Roof Slab Edges

Structural Members

Window Assemblies

Miscellaneous

It’s a pity that it has not been updated for a while with more content. It even still refers to Architectural Desktop.