Later Mughal architecture:

Art and architecture almost took a backseat in Aurangzeb`s rule. His reign from 1659-1707 marked the shift from the art loving Mughals to a more orthodox ruler under whom the decline set in. his fanatical zeal was destructive and this further was responsible for the decline of the flourishing art and architecture since ages. Due to his policies to overpower Hinduism, he made the Great Mosque towering over the Hindu holy city of Venaras.

A standard mosque form was developed in his reign where the eminence of three domes over the sanctuary in conjunction with a raised central arch, or iwan, and engaged minarets could be seen. The Moti Masjid (Pearl Mosque) built by Aurangzeb the Red Fort at Delhi incorporated a three-domed sanctuary with a raised central arch and mini-domed pillars projecting out of the roof to resemble minarets.
Aurangzeb`s concern seems to be for garden architecture than construction of palaces. Fatehbad near Agra is one of the most impressive of these gardens.