Stone Town
Stone Town, also known as Mji Mkongwe (Swahili for "old town"), is the old part of Zanzibar City, the main city of Zanzibar, in Tanzania. The newer portion of the city is known as Ng'ambo, Swahili for 'the other side'. Stone Town is located on the western coast of Unguja, the main island of the Zanzibar Archipelago. Former capital of the Zanzibar Sultanate, and flourishing centre of the spice trade as well as the slave trade in the 19th century, it retained its importance as the main city of Zanzibar during the period of the British protectorate. When Tanganyika and Zanzibar joined each other to form the United Republic of Tanzania, Zanzibar kept a semi-autonomous status, with Stone Town as its local government seat.
Omanis
Omani presence in the Swahili Coast can be traced since the Nabhani dynasty. In the late seventeenth century, Zanzibar became part of the overseas holdings of Oman after Saif bin Sultan, the imam of Oman, defeated the Portuguese in Mombasa, in what is now Kenya. 
Large numbers of Omanis settled in the Swahili Coast — especially after 1832, when the Omani Sultan Said bin Sultan moved his court to Zanzibar. To the Omanis, the region became a land of economic opportunity. Omanis who migrated to the Swahili Coast looked forward to a better life. The Omani community in the Swahili Coast grew and became financially successful.
Until the middle of 20th century Omanis stopped moving to Zanzibar after a revolution has occurred in Zanzibar in 1964. The Omani descendant, sultan of Zanzibar, Sultan Jamshid bin Abdullah was overthrown, and thousands of Omanis were killed, among many other Arabs. Soon after the revolution, many Omanis fled Zanzibar to avoid persecution and returned to their ancestral homeland Oman, while others chose to remain in the Swahili Coast.