He hung a picture on the west wall.

He hung a picture on the eastern wall.

This building is surrounded by firewalls.

I thought his plan was perfect, but in fact there were some flaws.

He said there's no such thing as a perfect human.

This retaining wall is designed to withstand earthquakes.

His favorite vase is placed in this niche.

The walls of this room are painted white.

He has been living in this town for several decades.

He is working as a generalist.