After the dissolution of the Austro-Hungarian state in November 1918. Zloczów found itself in the territory of the West Ukrainian People's Republic. Relations between the Ukrainian authorities and the local Poles were tense, and as early as November 1918 the first arrests and internment of the Polish population took place. On 26.03.1919, the Ukrainian military authorities began arrests among the Polish population living in Zloczów. According to Ukrainian sources, 148 people stood before a military summary court. They were accused, among other things, of belonging to a secret Polish organisation and high treason. After the trials, 22 Poles were sentenced to death and shot on 27 and 29 March and 1 April 1919, and buried in the local cemetery. After the Polish Army entered Zloczow, a commission of the Zloczow District Court exhumed the bodies. In 1921 a chapel-mausoleum was erected in memory of the murdered. The building was erected through the efforts of the Zloczów Mausoleum Building Committee, whose chairman was Dr Eugeniusz Kołaczkowski, a lawyer. The consecration of the mausoleum took place on 29.09.1921 and was combined with the funeral of the victims. The accompanying demonstration was attended by 40,000 people, including 22 parliamentarians of the Legislative Sejm.

The chapel was built on the model of the memorial in the Cemetery of Eaglets in Lviv - it is a small rotunda surrounded by a gallery, which is entered by several steps, inside there are niches with the coffins of the victims.

In 1997-1998 this chapel was renovated by the Zloczowian Association.