Ustad Ahmad Lahori (Punjabi pronunciation: [ʊstaːd ˈɛː(ɦ)məd lə(ɦ)oːɾiː]; c.1580–1649),[1] also known as Ahmad Ma'mar Lahori, was a Punjabi architect and engineer of the Mughal Empire who served as the chief architect during the reign of Shah Jahan; and was responsible for the construction of the Taj Mahal, one of the seven wonders of the world, in Agra; as well as the Red Fort in Delhi, both of which are UNESCO World Heritage sites.

[7] Two of his three sons,[8] Ataullah Rashidi and Lutfullah Muhandis, also became architects, as did some of his grandsons,[7] Shah Kalim Allah Jahanabadi one among them.

[9] Ahmad Lahori was learned also in the arts of geometry, arithmetic and astronomy, and according to his son Lutfullah was familiar with the Euclid's Elements and Ptolemy's Almagest.

The construction project employed some 20,000 artisans under the guidance of a board of architects led by Ahmad Lahori.

Mir Abd-ul Karim counted as the favourite architect of the previous emperor, Jahangir, and is mentioned as a supervisor, together with Makramat Khan,[13] for the construction of the Taj Mahal.