3LHD is an architecture studio led by four founding partners: Sasa Begovic (born 1967 in Bjelovar), Marko Dabrovic (born 1969 in Dubrovnik), Tanja Grozdanic (born 1968 in Zagreb) and Silvije Novak (born 1971 in Rijeka). All partners are graduates from Architectural Faculty, University of Zagreb, Croatia.

3LHD was established in 1994, when today's three of four partners were still students at Zagreb's Faculty of Architecture, in an atmosphere of Croatia's political and economic transition, which extends to the present. Under constant pressure from the laws of market transition studio was formed on the basis of team work and atmosphere.

3LHD partners have been visiting lecturers all over World and currently they are teachers on Architectural Faculty University in Zagreb Croatia and on TU Graz, Austria.