The capital, the city of Solothurn, is known as one of the most beautiful Baroque cities in Switzerland. But its origins start way back in celtic times, when it was a fortified town. The Romans left some traces here too, and the Zähringer Dynasty really established the city in 1218. Solothurn remained Catholic after the reformation and so was chosen in 1530 as the residence for the Ambassador of the King of France. Today, Solothurn is a picturesque and active city with many shops and trendy restaurants.