Humayun's Tomb in Delhi, built in 1561, was the first garden-tomb on the Indian subcontinent and set an important precedent for Mughal architecture. It was commissioned by Humayun's wife Bega Begum to honor her late husband. The tomb stands on a raised platform and features a double dome structure made of red sandstone and white marble. It inspired several architectural innovations, including the Taj Mahal. The tomb and its surrounding gardens were designated a UNESCO World Heritage Site in 1993 due to their historical and architectural significance.