In relation to the city of Jaipur, Sawai Jai Singh was many things: founder, ruler, and principal architect. It is believed that much of the city's planning originated with him.

Though the architecture of the city is essentially the same as the rest of India, it has its own particular features as well. The use of locally-manufactured fine mortar contributed to the uniqueness and artistry of its columns, arches and domes. A twenty-foot high, nine-inch thick wall with seven gateways protected the city from invasion, and serves today to give the inhabitants a sense of security and community. In later years, the Maharaja Ram Singh had the city's buildings painted pink, giving Jaipur its nickname, "Pink City."

A major purpose of architecture is often its aesthetic appeal. When form and function meet, the result is truly a thing of beauty. The Jaipur Observatory is an example, where the building architecture allows for astronomical measurement. Built by Singh (who was also an astronomy fan), the 90-foot high observatory's stairway serves as a sundial.

The Amber Palace, set on a hillside outside of Jaipur, is a perfect example of Indian architecture. Built over a period of two centuries (begun in 1592), it is a red sandstone and white marble structure combining Mughal and Hindu architecture.

Here is a link to information about the Architecture of Rajasthan