The sultanate that ruled this island began after Oman moved its capital to this island's Stone Town.
During an incident at this island, a yacht named Glasgow faced its much larger namesake. This island is the largest in an archipelago inhabited by Shirazis, the supposed descendants of Persian merchants. Barghash bin Said built a palace on this island that received the nickname "House of Wonders" because it used electricity. (*) Tippu Tip supplied several slaves to clove plantations on this island, which is often grouped with the nearby Pemba and Mafia islands. The sultanate that ruled this island began after Oman moved its capital to this island's Stone Town. The British received this island in exchange for German control of Heligoland. This island was the site of a 38-minute war in 1896. For 10 points, name this island that united with Tanganyika in 1964, forming Tanzania.
During an incident at this island, a yacht named Glasgow faced its much larger namesake.
Zanzibar [or: Unguja]