Maternia is a county of the Empire of Adammia located in the province of Greater Tytannia. It contains 67m² of land, making it the smallest county in the Empire. It consists of a single property, which is a simple terraced house with a small back yard. It has 2 permanent residents. From 2013 to 2017, Maternia held province status, and it was home to the Office of the Prime Minister for much of this time; it was downgraded to a county by the Empire of Adammia Act 2017 at the end of the First Era.
There are two entrances to Maternia. The only road in the province, William Way, starts at the back entrance and leads to 1 William Way, the home of the Prime Minister and the location of the Ministry of Citizenship. The other entrance is at the front of 1 William Way.