The Lycée Henri-IV[1] ((French pronunciation: [lise ɑ̃ʁi katʁ])) is a public secondary school located in Paris.

Lycée Henri-IV is located in the former royal Abbey of St Genevieve, in the heart of the Latin Quarter on the left bank of the river Seine, near the Panthéon, the church Saint-Étienne-du-Mont, and the rue Mouffetard.

The abbey was first established in 506; it flourished as a consequence of royal patronage, becoming an integral part of the Sorbonne and housing a great library.

The former abbey's library, which had the third-largest collection of books in Europe (transferred to the nearby Bibliothèque Sainte-Geneviève during the 19th century), is composed of four aisles forming a cross with a cupola in the intersection.

It is one of the main features of the Lycée with its 18th-century boiseries and pavement as well as a cupola frescoed and carved by the painter Jean II Restout in the 1730s.