Photo: Tt5361, CC BY-SA 4.0 via Wikimedia Commons
The third of the trio, this was built in 1271 by Vizier Sahip Ata Fahrettin Ali. The name means "celestial" or blue, for its tilework. It has an imposing gatehouse with twin minarets leading to a courtyard and cells, nowadays shops. The building originally had a second story, long gone.
Gökmedrese or Gök Medrese, also known as Sahibiye Medresesi, is a 13th-century medrese, an Islamic educational institution, in the city of Sivas, Turkey.
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Kurşunlu Hamamı
Hamamı are traditional baths in a 16th century building.
This former high school was where Atatürk consolidated his power base in 1919 and launched the struggle for independence. It now hosts three museum collections: congress with mementoes of that era, ethnography, and archeaology.
https://www.kulturportali.gov.tr/turkiye/sivas/gezilecekyer/arkeoloj-muzes327586
Small museum in a former School of Industry built in 1914. It contains fossils and prehistoric, Roman, Byzantine, Seljuk and Ottoman artifacts.