Tirsa, officially The Walled City of Tirsa, is the most populous and main settlement of Tirsa Valley. It is a walled city where the Castle of Tirsa. The city has exactly four entrances, one in each cardinal direction. Gate North leads to a road in the direction of Yalia, in Roscourd-Yalia; Gate East leads to the mountain range of Tein East; Gate South, also known as the Tall Gate, is the main entrance of Tirsa; and finally, Gate West leads to the mountain range of Tein West, where there is a road that leads directly to the town of Seade.

Heraldry

The coat of arms of Tirsa is described as:

Tierced in pale Vert, Tirsian-Woodpod, and Vert, a sentera Or seeded Tirsian-Woodpod within a circular wall with four gates in cross, viewed from above, Or.

This heraldry reflects the district's local flora, specifically the sentera flower and the Tirsian woodpod, as well as the unique four-gate architecture of the city.