The capital of Upper Austria is Linz, a city with a population of over 200, 000 people. It is located on the Danube River and is the third largest city in Austria. Linz is known for its cultural attractions, including the Ars Electronica Center, the Brucknerhaus concert hall, and the Lentos Art Museum. It is also home to numerous universities and research institutions. Linz has a long history, having been founded in Roman times and later becoming an important trading center during the Middle Ages. Today, it is a vibrant city with a thriving economy and a rich cultural heritage.