The Stavros Niarchos Foundation Cultural Center (Greek: Κέντρο Πολιτισμού Ίδρυμα Σταύρος Νιάρχος) is a complex in the bay of Faliro in Athens which includes new facilities for the National Library of Greece (NLG) and the Greek National Opera (GNO), as well as the 210,000 m² Stavros Niarchos Park. The Center was designed by architect Renzo Piano and its construction was funded by the Stavros Niarchos Foundation. The €566 million project was completed in 2016, and was donated to the Greek state in 2017.

Plans for a big scale donation by the Stavros Niarchos Foundation started in 1998. Initially the foundation planned to make separate donations to the National Library and the National Opera. In 2006 it was decided to build one complex for both organizations and after discussions with the Greek state the area of the former horse racing track was chosen. In 2008 the foundation chose Italian architect Renzo Piano to design the complex and in 2012 construction works started.