yüzyılı

In a sentence

• Bu bina, 19. yüzyıla aittir.

  This building belongs to the 19th century.

  In this sentence, 'yüzyıla' is in the dative case, indicating the time period to which something belongs.

• Sanat tarihindeki önemli yüzyıllardan biri 17. yüzyıldır.

  One of the important centuries in the history of art is the 17th century.

  Here, 'yüzyıldır' uses the 'dır/dir' suffix to emphasize a statement of fact about the specified century.

• Gelecek yüzyılın teknolojisi bugünden şekilleniyor.

  The technology of the next century is being shaped today.

  In this instance, 'yüzyılın' is in the genitive case, denoting possession or association to the 'next century'.