Humayun's tomb dates to about 1560. When Mughkal Emperor Humayun died, his first wife and chief consort, Empress Bega Begum, commissioned the first garden-tomb in India. It features the use of red sandstone. Beside the main building for the emperor's tomb there are several other monuments. One pre-dates the main tomb by 20 years. That tomb complex is for Isa Khan Niyiazi, an Afghan noble. The main tomb contains the graves of the empress and several others.
Please join us on the tour as Phil guides around the complex. He deliberately saved the best to (almost) last.
(But opening section says the restoration is complete. As we observed and is stated in that web page, the restoration is a continuing process.)