The Assyrian capital was Nineveh, a city located in modern-day Iraq. It was an ancient Mesopotamian city situated on the banks of the Tigris River and was one of the most important cities in the ancient world. It was the capital of the Neo-Assyrian Empire from 705 BC to 612 BC and was renowned for its grandeur and splendor. Nineveh was destroyed by the Babylonians in 612 BC, but its ruins remain today as a testament to its former glory.