Colonel Marin Ionescu-Dobrogianu House (Casa Colonel Marin Ionescu-Dobrogianu) is a late 19th-century residence in Constanța, where military officer, geographer and writer Marin Ionescu-Dobrogianu lived after settling in the city.
Ionescu-Dobrogianu became one of the most important early researchers of Dobrogea, publishing studies on Constanța, the Danube Delta and the wider region. His 1904 book Dobrogia în pragul veacului XX was the first Romanian monograph devoted to Dobrogea and earned recognition from the Romanian Academy as well as the Bene Merenti cultural distinction from King Carol I.
Before leaving Constanța in 1935, he donated his library and furniture from the house to the Mircea cel Bătrân High School, preserving an important part of his scholarly collection in the city.
