Msuka Mjini Ruins (Swahili Mji wa Kale wa Msuka Mjini) is a protected historic site located inside Micheweni District of Pemba North Region in Tanzania. Msuka Mjini has a Swahili mosque from the fifteenth century preserved in ruins on the Kigomasha peninsula on the island. The date 816AH (1414 CE) is carved on the interior of the circular mirhab.