The Lost City of Thinis, First Capital of a United Egypt
Thinis was a city of the ancient Egyptian civilization. Whilst Thinis and its alternative, This, were the Greek names of the city, the ancient Egyptians knew it as Tjenu. This city once served as the capital of ancient Egypt during the Early Dynastic Period. The existence of Thinis is attested by ancient authors, such as Manetho, widely believed to have been an Egyptian priest who lived during the Ptolemaic period.
Source: ancient-origins.net