The Mughal Empire, an Islamic empire that lasted in India from 1526 to 1857 left a mark on Indian architecture that was a mix of Islamic, Persian, Turkish, Arabic, Central Asian and native Indian architecture. A major aspect of Mughal architecture is the symmetrical nature of buildings and courtyards. Akbar, who ruled in the 16th century, made major contributions to Mughal architecture. He systematically designed forts and towns in similar symmetrical styles that blended Indian styles with outside influences. The gate of a fort Akbar designed at Agra exhibits the Assyrian gryphon, Indian elephants, and birds.