Nathmal ki Haveli, Jaisalmer is a late 19th century architecture that was once used to be the Prime Minister's house. It is famous for its extraordinary architecture and is considered to be the best in Jaisalmer. Apparently, there is an interesting story behind it. The grandeur structure is hard work of two brothers, Hathi and Lullu, who were jewellers and not architect. They both started with different facets of the building simultaneously. As a result, the left and right wing of the building is same but not identical. The scriptures made on the Haveli were never seen by the architect brothers in real life and were engraved by descriptions from the people who had seen it.

The merchants of Jaisalmer built some of the most ornate residences ever. Patwon Ki Haveli is made of Jaisalmer sandstone, these are adorned with jaalis and elaborate façades. The most skilful stonework is done on the outside, since they were a show of wealth more than anything else. The biggest and the most ornate of the havelis is the Patwon-ki-Haveli, a set of five houses adjacent to each other, built by five Jain brothers in the first half of the 19th century. These were the five sons of Guman Chand, a trader in textiles and precious metals.