Why did the Greeks spare antenor when they sacked troy?

The Greeks spared Antenor during the sacking of Troy because he was known for his pro-Greek sentiments and had previously advocated for peace and the return of Helen. His loyalty and diplomatic efforts made him a respected figure among the Greeks, leading them to see value in preserving him. Additionally, his status as a nobleman and his connections may have contributed to the decision to spare his life, as it aligned with their strategic interests in maintaining alliances after the war.