建物

1. Origins, structure, and basic meaning

• Structure: 建物, read たてもの, means a building.
• Basic usage: Use it for a building's location or height, or for adapting an existing building to a new use.

2. Common pitfalls and similar expressions

• A building and a room
  • 建物 refers to the whole building, while 部屋 refers to a room within it.
• A change of use
  • The second example's 小さな宿にした means turning the building into a small inn. Here に marks the resulting use.