Abagar ("Ðбагар") is a breviary by the Bulgarian Roman Catholic Bishop of Nikopol Filip Stanislavov printed in Rome in 1651. It is regarded as the first printed Bulgarian book. The language of the breviary is a specific blend of modern Bulgarian with Serbo-Croatian and Church Slavonic elements called "Illyric" that was used in writing by the Catholics from Chiprovtsi in the period.