The subject of this diploma thesis is Cohors II. Cyrrhestarum, a specialistic auxiliary archery unit of the ancient roman army. This unit originates from the syrian province of Cyrrhestica. Its members are from two ancient cities of northern Syria, Beroea and Cyrrhus. Cohors II. Cyrrhestarum was probably first stationed at Burnum, and then at Tilurium. It appears only in the roman province of Dalmatia. Everything known about it so far is known from 11 burial monuments of Cohors II. Cyrrhestarum that were discovered so far. Six burial monuments are from central Dalmatia and five are from northern Dalmatia. These are ten burial stelae and one funerary altar. On five burial stelae of Cohors II. Cyrrhestarum we have a door motif with two or four casettes, and based on that we can make a chronology of the degradation of door motif on this type of burial stelae. The door motif has no connections at all with the metroac religion, and is probably a reduced image of a burial temple (naiscos or ediculae). Soldiers of the Cohors II. Cyrrhestarum have exceptionally long military services, on average they served between 30 and 40 years in the ancient roman army. The final fate of this unit is unknow, it was probably disbanded in the province of Dalmatia around 80. A.D.