Which ancient wonder was located at the harbor entrance of the city of Alexandria?

The Lighthouse of Alexandria was the ancient wonder located at the harbor entrance of Alexandria.

Built on the island of Pharos, the lighthouse helped mariners approach one of the busiest ports of the Hellenistic world. Alexandria was founded by Alexander the Great in 331 BC and became a major center of trade, scholarship, and royal power under the Ptolemies.

The tower was not simply a decorative monument. Its elevated position and signaling system served a practical navigational purpose, making the harbor safer for ships approaching from the Mediterranean. Ancient accounts describe a very tall structure with multiple levels, although the precise arrangement and lighting method remain uncertain.

The Colossus of Rhodes is the common source of confusion because it was also associated with a harbor city. However, the Colossus stood on Rhodes and represented Helios, whereas Alexandria’s wonder was a lighthouse on Pharos. Earthquakes gradually reduced the lighthouse to ruins.