Tripoli Castle, also known as the Citadel of Raymond de Saint-Gilles, is a historic fortress located in the city of Tripoli in northern Lebanon. It was built in the 12th century by Raymond de Saint-Gilles, the Count of Toulouse and one of the leaders of the First Crusade.

The castle sits on a hill overlooking the Mediterranean Sea and the city of Tripoli. It was constructed using local limestone and features a rectangular design with four corner towers and a central keep. Over the centuries, the castle was expanded and modified by various rulers and armies, including the Mamluks and the Ottomans.

Today, the castle is a popular tourist attraction and is open to the public. Visitors can explore the castle's many rooms and passageways, climb the towers for stunning views of the surrounding area, and learn about the castle's rich history through informative exhibits and displays. The castle also hosts various cultural events and festivals throughout the year.