The collection constitutes a unique complex of representative living quarters, today illustrating the way of life led by upper social classes towards the end of the 19th and in the first decades of the 20th c. Back in 1966, during her lifetime, the former owner, Ms. Anka Gvozdanovic (1887-1968), wife of Dragutin Gvozdanovic (1851-1926), judge and landlord, member of the old Zumberak Gvozdanovic line, donated the apartment along with its entire inventory to the City of Zagreb. In 1967, the collection was entrusted to the management of the , in the scope of which it is currently operating as a public cultural/historic institution.
The building holding the collection is located in Zagreb's Upper Town. It was built towards the beginning of the 19th c. Until the very present day, the housing facilities have been entirely preserved as they were while their former owner was still alive. They have been furnished and equipped in the spirit of historicist styles of the second half of the 19th century. However, their decoration also reflects certain interventions from the first decades of the 20th c.
The representative space of the 1st floor is entered into through a hall furnished by Neorenaissance furniture made in Venice towards the end of the 19th c. The flower stands made of polychrome wood after their 18th c. Venetian originals date back to the same period. There are several etchings by M. C. Crncic hanging on the walls.
The western wing, with a view to Tuskanac's green forests, holds several reception rooms, each decorated in a different style and named after the particular colour dominating it.