Which Greek island was nearly destroyed by a major volcanic eruption in the 2nd millennium BCE?

The Greek island that was nearly destroyed by a major volcanic eruption in the 2nd millennium BCE is Thera (also known as Santorini).12

Geologically, the modern island of Thera is the remaining eastern portion of a volcano that exploded in a massive eruption. While traditionally dated to approximately 1500 BCE, some scholars now suggest the event occurred earlier, during the 1620s BCE, based on evidence from radiocarbon dating, tree rings, and ice cores. The eruption was so powerful that it buried a Minoan civilization settlement at Akrotiri under volcanic debris, preserving it in a manner similar to Pompeii. Ash and pumice from the event have been discovered as far away as Egypt and Israel, and the catastrophe is frequently linked to the legend of Atlantis.12