Islamic architecture encompasses a wide range of both secular and religious styles from the foundation of Islam to the present day. What today is known as Islamic architecture owes its origin to similar structures already existing in Roman, Byzantine and Persian lands which the Muslims conquered in the 7th and 8th centuries. Further east, it was also influenced by Chinese and Indian architecture as Islam spread to Southeast Asia. The principal Islamic architectural types are: the Mosque, the Tomb, the Palace and the Fort. From these four types, the vocabulary of Islamic architecture is derived and used for other buildings such as public baths, fountains and domestic architecture.