He came to be well known to the scientific and cultural circles in Bulgaria not until the 1980s, although his life and work coincides with those of already famous men of letters such as Petar Parchevich, Filip Stanislavov and Franchesko Soymirovich.
In 1642 Pope Urban II declared Sofia to be the seat of the Bulgaria's Catholic Archbishopric and appointed Peter Bogdan Bakshev as the Archbishop.
Together with Petar Parchevich, another highly educated Bulgarian Catholic cleric and diplomat and Franchesko Soymirovich, they visited Austrian monarch Ferdinand II, the king of the Polish–Lithuanian Commonwealth Sigismund III Vasa, and his heir, Władysław IV Vasa, as well as Wallachian voivode, Matei Basarab.
In his other works he mentioned also the geographical and ethnic borders of Bulgaria and Bulgarian people in Moesia, Thrace and Macedonia.
After two centuries, these boundaries were confirmed with the firman of the Turkish sultan for the formation of the Bulgarian Exarchate, and by the decisions of the 1876 Constantinople Conference of the then Great Powers of Europe.
In 1667 Bakshev finished his major work “History of Bulgaria” and tried to prepare European thought on the liberation of the country.
Petar Bogdan's greatest work, a history of Bulgaria, was written a century before the Istoriya Slavyanobolgarskaya of Paisius of Hilendar, but was published after his death.