Salamanca's main claim to fame in Spain is that it is the home of Spain's oldest university, founded in the 1200s. There are tours of the inside of the university - mainly the lecture halls I believe - which we didn't do. But what we did see was still impressive. The facade to the main building of the university is really impressive - pictures do not do it justice. Salamanca's museum is in the adjacent square and in a nearby court is a really interesting site. There is a 15th century ceiling mural called 'the sky of Salamanca' that depicts the constellations in the night sky.