Hafnia Hodierna, Eller Udførlig Beskrivelse om den Kongelige Residentz- og Hoved-Stad Kiøbenhavn is an engraved architectural work on Copenhagen, published by the Danish architect Lauritz de Thurah in 1748. Profusely illustrated throughout, it is a valuable source of knowledge as to the appearance of Copenhagen in the middle of the 18th century. It complements, with some overlap, de Thurah's other major work Den Danske Vitruvius, which focuses primarily on surrounding areas, as well as the rest of Denmark.