Windows
Black Dirty Drapes, Right Half Top
A cloth stable block with 5 hit points.
Changes into
When its hit points run out it becomes 
Curtain Rod.
Drops when destroyed
Cloth Fragment× 1-3
Where to find (7 POIs)
The Last Sunset Nursing Home (tier 5), Towersley Estate (tier 3), Don Diego Estate (tier 2), The Wagner Residence (tier 2), Shawn's Shack (tier 1), The Gilbert Residence (tier 1), The Tan Residence.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.