The earliest documentary record of sunspots in the world appeared in the book of Han Dynasty in China, which described that the sun was as dark as a projectile. Europeans discovered sunspots much later than this time. After they saw this phenomenon, the local church banned talking and denied the existence of sunspots because it violated religious teachings.
The temperature of sunspots is generally around 4500 degrees Celsius, which is about 1500 degrees Celsius lower than the average temperature of the sun surface (6000 degrees Celsius).