Nikolaus I, Prince Esterházy was a Hungarian prince, a member of the famous Esterházy family. His building of palaces, extravagant clothing, and taste for opera and other grand musical productions led to his being given the title "the Magnificent". He is remembered as the principal employer of the composer Joseph Haydn.

Eszterháza is a palace in Fertőd, Hungary, built by Prince Nikolaus Esterházy. Sometimes called the "Hungarian Versailles", it is Hungary's grandest Rococo edifice. It was the home of Joseph Haydn and his orchestra from 1766 to 1790.