The ruins at Hauz Khas are a happy place to spend the evening catching up with friends. Amidst the medieval architecture of an old university complex, you can find a quiet spot to relax.
After the sack of Baghdad by the Mongols in 1258, Delhi became the most important place in the world for Islamic education. Many leading philosophers and teachers migrated to Delhi. The university at Hauz Khas was established in 1352, and became one of the largest and best equipped Islamic seminaries in the world.
They university came up around a beautiful Royal Tank (Hauz Khas). The tank was originally dug by the Khiljis in the 1200's, but it was deepened and improved by Firoz Shah Tughlaq (1309 - 1338). Can you imagine how beautiful this university must have been? It is a green oasis even now. Firoz Shah Tughlaq's tomb is also there, in the building on the left.
So many people, each lost in their own world :) Perhaps just a handful of them knew the history of Hauz Khas; or that algebra was once taught here, and astronomy, and poetry, and calligraphy and geography.