The Prince Anna of Mazovia Clinical Hospital, located at 2 Karowa Street in Warsaw, was founded on December 15, 1912, as a maternity home for unmarried women. Its original name was associated with Empress Alexandra Feodorovna, the wife of Tsar Nicholas II. Architect Kazimierz Skórewicz and chief physician W. Popiel designed the building in the form of a quadrangle with an inner courtyard, featuring modern amenities for the time, such as electric elevators and central heating. The hospital underwent a series of expansions and was renamed in 1925 in honor of Anna, Princess of Mazovia. Despite the outbreak of World War II, it continued to provide care, and after the war, in 1949, it resumed operations as the Municipal Maternity Hospital No. 2. In 1955, it gained clinical hospital status. A new building was constructed in 1964, introducing innovative obstetric solutions, including the rooming-in system and the first laser surgeries in Poland. The hospital also became a hub for significant scientific research in gynecology and obstetrics. In the 1970s, technical issues arose due to the building's location on a former landfill, leading to its closure in 1979. After renovations, the hospital reopened in 1983. In 1989, it was renamed Clinical Hospital No. 2, and a few years later, its original patron's name was restored. In subsequent years, numerous new departments were opened, and the infrastructure was modernized. Notably, the hospital was the first in Poland to use an obstetric vacuum extractor and an ultrasound machine. It has received numerous awards for the quality of its services, including the "Teraz Polska" award and the "Safe Hospital" title.