Croatian Lodge “Herceg Stjepan Kosača” (locally known as “Hrvatski Dom Herceg Stjepan Kosača”) is a city sponsored public institution in Mostar, Bosnia and Herzegovina which promotes, assists and organizes educational and art events. It was named after Stjepan Vukčić Kosača, a 14th-century nobleman from Herzegovina. Its premisses are used for art exhibitions, concerts, theatre performances, lectures, movie screenings, puppet shows, dance classes, lectures, and conventions.
The Croatian Lodge “Herceg Stjepan Kosača” building is located in the city center (Rondo area) and it houses a public library, cafe-bar and a music school. “Herceg Stjepan Kosača” is a main venu of the art event called “Dani Matice Hrvatske” which encompasses diverse cultural events between March and May every year and enlivens the city of Mostar.