The Gök Medrese (Sky Medrese) is a Seljuk-period theological school dating from the 13th century, named for the blue tilework that once decorated its facade — gök means sky or blue in Turkish. Much of the tile has been lost over the centuries, but the carved stone portal is still impressive, its geometric and floral patterns executed with the precision that Seljuk craftsmen brought to stonework across Anatolia.
The building has been used for various purposes over the centuries and is not always open to the public, but the exterior and portal are visible at any time. It stands as evidence that Amasya was an important centre of Islamic scholarship under both the Seljuks and the early Ottomans — the city had several medreses of this kind, and its schools produced scholars who served throughout the empire.