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The Rub’tahta is a flat plate in the shape of a quarter circle. The instrument from Konjic, from the village of Parsovići, is one of around ten rub’tahtas preserved in Bosnia and Herzegovina. It was made by Emin, son of Omer, in 1794/1795, and was owned by Mustafa ef. Sarajlić. Scholars believe it was made in a local workshop. The material it is made from is wood.
Throughout history, various astronomical instruments were used to calculate prayer times: astrolabes, sundials, and mechanical clocks. These instruments were made by astronomers of various faiths. The rub’tahta has its origins in the East. The rub’tahta from Konjic was made in a local workshop and, according to our information, there are only around ten such instruments in Bosnia and Herzegovina — some in private collections and others held in museums.
The rub’tahta also has its own shoulder bag for carrying, and the instructions for use are inscribed on the instrument itself. The people who dealt with measuring and calculating time were called muvekits. They were required to have a knowledge of the basics of astronomy and mathematics.
As one of the most significant exhibits of the Konjic Heritage Museum, the rub’tahta represents a very important historical object that was used in the everyday life of our ancestors in the past. Today it is a true attraction for visitors of all generations who come to the Konjic Heritage Museum.