Treysa, which has been an independent city up to 1970, is the biggest district of the German city Schwalmstadt. It was incorporated into Schwalmstadt in December 1970.
The Treysa Meteorite, also known as the Rommershausen Meteorite (both Treysa and Rommershausen are districts of Schwalmstadt), is an astronomical relic found in a wooded area near the Rommershausen district of Schwalmstadt in northern Hesse, Germany. The meteorite made German astronomical history as one of the most significant confirmed meteorite collisions of recent history. It is classified as a medium octahedrite of the IIIB chemical class and shows Widmanstätten patterns.