Before the 5th century

From around 500 BC, the territory of modern-day Slovakia was settled by Celts, who built powerful oppida on the sites of modern-day Bratislava and Havránok. Biatecs, silver coins with the names of Celtic Kings, represent the first known use of writing in Slovakia. From 2 AD, the expanding Roman Empire established and maintained a series of outposts around and just north of the Danube, the largest of which were known as Carnuntum and Brigetio. Near the northernmost line of the Roman hinterlands, Limes Romanus there existed the winter camp of Laugaricio (modern-day Trenčín) where the Auxiliary of Legion II fought and prevailed in a decisive battle over the Germanic Quadi tribe in 179 AD during the Marcomannic Wars. The Kingdom of Vannius, a barbarian kingdom founded by the Germanic Suebian tribes of Quadi and Marcomanni, as well as several small Germanic and Celtic tribes, including the Osi and Cotini, existed in Western and Central Slovakia from 8–6 BC to 179 AD.