Relative clauses in the prepositional (в котором, на котором)

Describing Locations with "Который"

When you want to describe a place by talking about what is located or happening in or on it (e.g., "the house in which we live"), the relative pronoun который takes the prepositional case.

Remember the core rule:

  • Gender and number come from the noun it describes.
  • Case comes from its role in the relative clause. Here, it follows the preposition в (in) or на (on).

Masculine and Neuter Nouns

For masculine and neuter nouns, the prepositional form is котором.

The preposition you use inside the clause depends on which preposition the place naturally takes. For example, we say в доме (in the house), so we use в котором.

However, because we say на участке (on the plot), we must use на котором.

Feminine Nouns

For feminine nouns, the prepositional relative pronoun is которой.

We are sitting in the room in which the fireplace is located.
Мы сидим в комнате, в которой находится камин.

Subject vs. Location

Always look at what the relative pronoun is doing inside its own clause to determine its case.

If the relative pronoun is the subject of the clause (e.g., "the house which is located..."), it takes the nominative case.

But if it describes the location where something else is or happens (e.g., "the house in which it is warm"), it takes the prepositional case.