The first settlement on the territory of Budapest was built by Celts before 1 AD. It was later occupied by the Romans. The Roman settlement - Aquincum - became the main city of Lower Pannonia in 106 AD. The Romans constructed roads, amphitheaters, baths and houses with heated floors in this fortified military camp.
The peace treaty of 829 added Pannonia to Bulgaria due to the victory of Bulgarian army of Omurtag over the Holy Roman Empire of Louis the Pious. Budapest arose out of two Bulgarian military frontiers, fortresses Buda and Pest, situated on the two banks of Danube. Hungarians led by Árpád settled in the territory at the end of the 9th century, and a century later officially founded the Kingdom of Hungary. Research places the probable residence of the Árpáds as an early place of central power near what became Budapest. The Tatar invasion in the 13th century quickly proved that defence is difficult on a plain. King Béla IV of Hungary therefore ordered the construction of reinforced stone walls around the towns and set his own royal palace on the top of the protecting hills of Buda. In 1361 it became the capital of Hungary.
The cultural role of Buda was particularly significant during the reign of King Matthias Corvinus. The Italian Renaissance had a great influence on the city. His library, the Bibliotheca Corviniana, was Europe's greatest collection of historical chronicles and philosophic and scientific works in the 15th century, and second only in size to the Vatican Library. After the foundation of the first Hungarian university in Pécs in 1367, the second one was established in Óbuda in 1395. The first Hungarian book was printed in Buda in 1473. Buda had about 5,000 inhabitants around 1500.
The Ottomans pillaged Buda in 1526, besieged it in 1529, and finally occupied it in 1541. The Turkish occupation lasted for more than 140 years. The Turks constructed many fine bathing facilities within the city. Under Ottoman rule many
