Slide showing a photograph of the inside of the cathedral, in Spanish Town. Spanish Town is the capital and the largest town in the parish of St. Catherine in the county of Middlesex, Jamaica.. Part of Box 108. Boswell Collection. Slide number 32. Jamaica, officially the Commonwealth of Jamaica, is an island nation of the Greater Antilles, situated in the Caribbean Sea. Jamaica is south of Cuba and west of Hispaniola, the island containing the nation-states of Haiti and the Dominican Republic in the West Indies.