The Hôtel de Cluny was once the town house of the abbots of Cluny and is now the Musée de Cluny, an important museum containing a variety of artifacts from the Middle Ages.
The Collège de Sorbonne, founded in 1257, was a constituent of the University of Paris although, at least in the 20th century, the term Sorbonne has been applied to the whole of the University. The University was broken up in 1970 into 13 universities. Four of them contain Sorbonne in their names (University of Paris I: Panthéon-Sorbonne, University of Paris III: Sorbonne Nouvelle, University of Paris IV: Paris-Sorbonne and University of Paris V: Descartes University) and are nearby.
The Collège de France, founded in 1530, a higher research establishment, is also nearby.