In 1988, Matusevich became one of the first to preach in the
Belarusian language, which attracted a number of intellectuals and young people from all over Belarus on the wave of the national revival. On 12 November 1989, Barun commemorated
Saint Josaphat, the event is considered the first action of the modern
Uniate Church in Minsk. Starting in 1990, he was the rector of the Greek-Catholic parish of Saint Joseph, in
Minsk. Matusevich consecrated a cross in
Kurapaty, the site of mass executions by the
NKVD in
Soviet Belarus in the 1930s. In April 1989, he took part in the action of the Belarusian opposition, "
Chernobyl Way". Matusevich was a board member of the Association of the Belarusian Language in Minsk, a board member and one of the founders of the Belarusian Bible Society and a pastor in the local Scout movement. Matusevich is regarded as someone who "brought up a whole cohort of Belarusian Uniate priests". == Death and resting place ==