Sher Mandal

Sher Mandal situated inside the Purana Qil'a (Old Fort) in Delhi is an observatory built by Sher Shah, founder of Sur Empire in northern India. This double-storeyed octagonal tower of red sandstone was used as a personal observatory and library by the Mughal emperor Humayun after he recaptured the fort.

On top of the tower is an octagonal chhatri (dome-shaped pavilion) which is supported by eight pillars and decorated with white marble. It was in Sher Mandal where emperor Humayun tripped on the stairs and met with his tragic death.