The Catholic Church is the fourth largest religious congregation in Bulgaria, after Eastern Orthodoxy, Islam and Protestantism.
Its roots in the country date to the Middle Ages and are part of the worldwide Catholic Church, under the spiritual leadership of the Pope in Rome.
Bulgarian Catholics live predominantly in the regions of Svishtov and Plovdiv and are mostly descendants of the heretical Christian sect of the Paulicians, which converted to Catholicism in the 16th and 17th centuries.
Nonetheless, Catholic missionaries renewed their interest in Bulgaria during the 16th century, after the Council of Trent, when they were aided by merchants from Dubrovnik on the Adriatic.
After Bulgaria became independent, the Catholic Church again tried to increase its influence by opening schools, colleges, and hospitals throughout the country, and by offering scholarships to students who wished to study abroad.
Under communist rule, Catholic priests were charged with following Vatican orders to conduct antisocialist activities and help opposition parties.
Like the practitioners of the other faiths, Catholics in Bulgaria have enjoyed greater religious freedom after the end of communist rule in 1989.