Exciting architecture, technology, art, and culture merge into a city of life in Linz.The Linz area has been around since the 4th millennium BC. Chr. A continuous settlement on. The Romans built a castle here in the 1st century AD l with the name Lentia. The name Linz is testified for the first time in a document from the year 799 together with the Martinskirche.In 1490, Linz was first designated as the state capital of Austria if the Enns. From 1489 to 1493, the city was the residence of Emperor Frederick III, who ruled from here over the Roman-German Empire.