Alyattes I was a king of Lydia, an ancient kingdom located in what is now western Turkey. He ruled from around 610 to 560 BCE and is known for his military campaigns and efforts to expand Lydia's territory. Alyattes I is often credited with establishing the Lydian Empire's power and influence in the region. One of his notable achievements was the defeat of the Medes, which helped solidify Lydia's dominance. Alyattes I is also associated with the introduction of coinage in Lydia, paving the way for economic development. His reign marked a significant period in the history of Lydia and the ancient world.