The largest structure in the city, and the tallest structure in Westeros, is the Hightower, a massive stepped lighthouse which extends some into the sky and is topped by a huge beacon which can be seen for many miles out to sea. Oldtown is ruled from the Hightower by House Hightower. Originally kings in their own right, they later swore fealty to the Gardeners of Highgarden, and became vassals of the Tyrells after the Conquest. The Hightowers are known for their loyalty and stalwartness. The current ruler of the city is Lord Leyton Hightower.