Cyrodiil

Cyrodiil  was originally an Slave colony of the Ayleids, within the World of Tamriel. However, after the Defeat of The Ayleids at The hands of Empress st. Alessia their elven Culture started to decay of its society and population, its political structure eventually dissolved. It was finally abandoned altogether due to subsequent  Centuries of disorder and, ultimately, a famine.

Multiple Years Later Durning The Last Days of The 2nd Era The God Emperor Tiber Septim Conquered The Province and Would Later Claim Cyrodiil For his Empire and Make it The Capital of Tamriel itself.

The Province's location is Located, at The Center of Tamriel itself

History of Cyrodiil
Cyrodiil, The Capital Province of the Kingdom of Tamriel, was colonised first by Ayleid Elves in The Merethic Era. After only two years, however, Empress St. Alessia turned most of the inhabitants to her side Forming the First Empire