Transylvania the Romanian population of Transylvania gathered in Alba Iulia on 1 December 1918 to proclaim the union of Transylvania with the Kingdom of Romania. In Transylvania, there are many medieval smaller towns such as Sighișoara, Mediaș, Sebeș, and Bistrița. Official censuses with information on Transylvania's population have been conducted since the 18th century. On May 1, 1784 the Emperor Joseph II called for the first official census of the Habsburg Empire, including Transylvania. The data was published in 1787, and this census showed only the overall population (1,440,986 inhabitants). , a 19th-century Hungarian statistician, estimated in 1842 that in the
History of Transylvania organization of the Transylvanian Catholic episcopacy (with Gyulafehérvár as its seat), which was finished in 1009 when the bishop of Ostia (as papal legate) visited Stephen and they approved diocesan divisions and boundaries. In 1018 Stephen defeated Ahtum, ruler of the country around the lower Mureș River. According to the "Chronicon Pictum", Stephen I also defeated the legendary Kean (a ruler in southern Transylvania of Bulgarians and Slavs). During the 12th century, the Székelys were brought to eastern and southeastern Transylvania as border guards. In the 12th and 13th centuries, the areas in the south and northeast were settled by