The best known style of Indo-Islamic architecture is Mughal architecture, mostly built between about 1560 and 1720, but there are many other earlier and regional styles. Mughal architecture's most prominent examples are the series of imperial mausolea, which started with the pivotal Tomb of Humayun, but is best known for the Taj Mahal, completed in 1648 by emperor Shah Jahan in memory of his wife Mumtaz Mahal who died while giving birth to their 14th child. The Taj Mahal is completely symmetrical except for Shah Jahan's sarcophagus, which is placed off center in the crypt room below the main floor. This symmetry extended to the building of an entire mirror mosque in black marble to complement the Mecca-facing mosque place to the west of the main structure.