The Alte Nationalgalerie is an art museum located on Museum Island in Berlin, Germany. It was opened in 1876 and is part of the National Museums in Berlin. The museum houses a collection of 19th-century art, including works from the Romantic, Impressionist, and Neoclassical periods. The building itself is designed in a neoclassical style, featuring a grand staircase and a large portico. Inside, visitors can find masterpieces by renowned artists such as Caspar David Friedrich, Édouard Manet, and Claude Monet. The museum plays a significant role in preserving and showcasing European art history.