The boundaries of historical Lydia varied across the centuries.
It was bounded first by Mysia, Caria, Phrygia and coastal Ionia.
Later, the military power of Alyattes and Croesus expanded Lydia, which, with its capital at Sardis, controlled all Asia Minor west of the River Halys, except Lycia.
After the Persian conquest the River Maeander was regarded as its southern boundary, and during imperial Roman times Lydia comprised the country between Mysia and Caria on the one side and Phrygia and the Aegean Sea on the other.
The boundaries of historical Lydia varied across the centuries. It was bounded first by Mysia, Caria, Phrygia and coastal Ionia. Later, the military power of Alyattes and Croesus expanded Lydia, which, with its capital at Sardis, controlled all Asia Minor west of the River Halys, except Lycia. After the Persian conquest the River Maeander was regarded as its southern boundary, and during imperial Roman times Lydia comprised the country between Mysia and Caria on the one side and Phrygia and the Aegean Sea on the other.
Lydia