Bagamoyo Historical Festival in Bagamoyo
Bagamoyo, one of East Africa's most historically significant Swahili coastal towns, is home to a confirmed, long-running arts and culture festival organized by the Bagamoyo Arts and Cultural Institute, though the exact name Bagamoyo Historical Festival could not be independently verified against that documented event.
Wikipedia confirms the Bagamoyo Arts and Cultural Institute as a real institution focused on visual and performing arts and culture that organizes a yearly International Festival of Arts and Culture in Bagamoyo, describing it as known internationally.