Ali Koç Baba was an Alevi-Bektashi dervish who migrated from Anatolia to the Balkans; sources present him as a disciple of Koyun Baba or as a son of Seyyid Ali Sultan and a descendant of Haci Bektas Veli (B. Aleksiev, "Ali Koç Baba", isamveri; "Ali Koç Baba Ocagi" study; TDV, "Nikopol"). He was active in the Nikopol region in the Ottoman period and is said to have joined Rumelian campaigns. His tomb, a pyramidal stone structure on the "Tekke" hill by the Danube, is visited by both Muslims and Christians for Hidrellez healing pilgrimages. His death year is disputed (14th-15th c.); although the tomb inscription bears the date of the 1396 Battle of Nicopolis, the sources give no firm year (noted transparently).