One of the most well-known projects of Shah Jahan is the Taj Mahal. It is a rectangular complex made of marble. The main building of the Taj stands on a high marble platform. The building is decorated by calligraphy, inlay work on the exterior and pietra dura on the interior. It has a garden in the front, which has been divided into four quadrants, with two canals running across it to lend symmetry to the building, which is a tomb of Shah Jahan's wife Mumtaz Mahal.