Alaeddin Mosque, also known as Alaaddin Mosque is a historic mosque in Odunpazarı district of Eskişehir Province, Turkey. Alaeddin Mosque is situated in Alaeddin Park at Odunpazarı, Eskişehir. According to an inscription at the base of its minaret, it was built in 1267, during the reign of Seljuq Sultan of Rûm Gıyaseddin Keyhüsrev III. It was donated by C…Alaeddin Mosque, also known as Alaaddin Mosque is a historic mosque in Odunpazarı district of Eskişehir Province, Turkey. Alaeddin Mosque is situated in Alaeddin Park at Odunpazarı, Eskişehir. According to an inscription at the base of its minaret, it was built in 1267, during the reign of Seljuq Sultan of Rûm Gıyaseddin Keyhüsrev III. It was donated by Cacaoğlu Cibril or Cacaoğlu Nureddin, a follower of Mevlana. It is so one of the oldest buildings in Eskişehir.