Humayun's tomb is the tomb of the Mughal Emperor Humayun in Delhi, India. It was the first garden-tomb on the Indian subcontinent, and is located in Nizamuddin East, Delhi, India, close to the Dina-panah Citadel, also known as Purana Qila (Old Fort), that Humayun found in 1533. 

It was also the first structure to use red sandstone at such a scale. The tomb was declared a UNESCO World Heritage Site in 1993, and since then has undergone extensive restoration work, which is complete.

- Wikipedia