Fatehpur Sikri sits on rocky ridge, 3 km. in length and 1 km. wide, and palace city is surrounded by a 11 km wall on three side with the fourth being a lake at the time. Its architect was Tuhir Das and was constructed using Indian principles. The buildings of Fatehpur Sikri show a synthesis of various regional schools of architectural craftsmanship such as Gujarat and Bengal. This was because indigenous craftsmen from various regions were used for the construction of the buildings. Influences from Hindu and Jain architecture are seen hand in hand with Islamic elements. The building material used in all the buildings at Fatehpur Sikri, palace-city complex, is the locally quarried red sandstone, known as 'Sikri sandstone'. It is accessed through gates along the five-mile long fort wall, namely, Delhi Gate, the Lal Gate, the Agra Gate, Birbal's Gate, Chandanpal Gate, The Gwalior Gate, the Tehra Gate, the Chor Gate and the Ajmere Gate.