The American University of Beirut (AUB) is a private, secular, and independent university in Beirut, Lebanon. It was founded in 1866 by American Protestant missionaries as the Syrian Protestant College and was renamed the American University of Beirut in 1920.

AUB has a diverse student body and offers undergraduate, graduate, and professional degree programs in fields such as medicine, engineering, business, arts, and sciences. It has a highly regarded medical center and is known for its research activities and collaborations with international institutions.

The university's campus is located in the neighborhood of Ras Beirut, overlooking the Mediterranean Sea. It includes several libraries, research centers, student dormitories, athletic facilities, and cultural venues. The campus is also home to several museums, including the AUB Archaeological Museum and the Nicolas Sursock Museum.

AUB has played a significant role in Lebanon's history and has been a center for intellectual and cultural exchange in the Middle East. It has faced several challenges over the years, including political instability, financial difficulties, and war. Despite these challenges, AUB has remained committed to its mission of providing quality education and contributing to the development of Lebanon and the region.