Paphos (Pafos) Castle was initially a Byzantine fort constructed to protect the harbour. In the 13th century the Lusignans rebuilt it only to be pulled down by the Venetians in 1570 during the Ottoman invasion. Then, the Ottomans rebuilt it again after they captured the island a short while after. The role of protecting the harbour was originally undertaken by the Saranta Kolones (Forty columns) fort, the remains of which lie several hundred yards away. Throughout its long history, the Pafos Castle was used not only for protection, but also as prison cells and a storage area for salt during the British colonial years. Pafos castle was declared an ancient monument in 1935 and is one of the most important landmarks in the Paphos region. Numerous cultural events take place in the square immediately in front of the castle. Every year during the month of September, the castle hosts the Pafos Aphrodite Festival which presents a different opera each year by world renowned artists with the castle featuring as a majestic backdrop to the event.