Which god did the Colossus of Rhodes represent?

The Colossus of Rhodes represented Helios, the Greek sun god.

The statue was erected at Rhodes after the island city resisted a siege by Demetrius I of Macedon. Helios was especially important to Rhodes, whose inhabitants regarded him as a principal divine protector. The colossal image therefore celebrated both the city’s religious identity and its military success.

The statue was made of bronze plates attached to an iron framework and supported by a substantial structure. Ancient accounts describe it as roughly 30 metres high or more, making it one of the tallest statues of the ancient world. It was completed around 280 BC but fell in the earthquake of 226 BC.

Helios is sometimes mistaken for Apollo because both gods were connected with sunlight in later interpretation. In the traditional identification of the Rhodian monument, however, the represented deity is Helios. The statue was not a representation of a human ruler.