This is the 10501st most frequent Turkish word.
bulundurulan
"Bulundurulan" means "kept" or "maintained."
Here, 'bulundurulan' modifies 'kitaplar' (books), meaning 'the books that are kept'.
Kütüphanede bulundurulan kitaplar her yaştan okuyucu için uygundur.
The books kept in the library are suitable for readers of all ages.
In this case, 'bulundurulan' refers to 'belgeler' (documents) that were 'made available' or 'kept present'.
Toplantıda bulundurulan belgeler gizlidir.
The documents made available at the meeting are confidential.
Here, 'bulundurulan' describes 'sanat eserleri' (artworks) that are 'exhibited' during the exhibition.