Qasr al-Basha (Arabic: قصر الباشا), also known as Radwan Castle and Napoleon's Fort, was formerly a large palace, and now a two-floored girls' school and museum, situated in the Old City of Gaza. It served as a seat of power in the Mamluk and Ottoman periods and as a police station under the British Mandate.
The first floor of Qasr al-Basha was built by the Mamluk sultan Zahir Baibars in the mid-13th century. The facade bares the landmark of Baibars which is a relief sculpture of two lions facing each other. The geometrical patterns and domes, fan and cross vaults are typical Mamluk architecture under Bahri rule. According to local legend, in the 13th century CE, when Baibars was still a general fighting the Crusaders and Mongols throughout the Levant, he passed through Gaza on several occasions. During one of his visits, Baibars is believed to have married in Gaza and built a grand mansion for his Gazan wife and children. It is said that Qasr al-Basha is what remains of this home.
The second floor of the building is largely of Ottoman-era construction. In the 17th century, Qasr al-Basha served as the fortress home of the ruling Radwan dynasty (hence the name "Radwan Castle") and later pashas of Gaza, who were governors appointed by the Ottoman governor of the Damascus Province. During this era, the fortress was provided with arrow slits and underground passages as means of defense. Within the complex were soldier's lodgings, a mosque, granary, an armory, and cannons. The height of the structure made Qasr al-Basha a strategic point in Gaza. This, along with its fortifications, was the probable reason Napoleon Bonaparte spent three nights at the palace during his Siege of Acre in 1799, hence the name "Napoleon's Fort".
Turkish traveler Eviliya Celebi wrote of Qasr al-Basha in 1649, saying "the Citadel was built in ancient times and destroyed by Nebuchadnezzar. The present citadel derives from a later time. It is small and rectangular and lies one hour distant, east of the sea. Its walls are twenty yards high. It has a metal door which opens in the direction of the qibla. The commander and the garrison must always be present here to fulfill their guard duties because it is in a dangerous place, here the Arab tribes and the enemy are numerous."