The Siemiatycze Deanery is one of the 11 Roman Catholic deaneries in the Drohiczyn Diocese, encompassing 12 parishes. The deanery includes parishes in Czartajew, Dziadkowice, Mielnik, and Siemiatycze, where numerous churches with diverse architectural styles can be found. The parish church in Siemiatycze, dedicated to St. Andrew Bobola, stands out for its Baroque style, while other parishes, such as those in Mielnik or Milejczyce, showcase local architectural features, often dating back to the partitions of Poland and the Middle Ages. Religious culture in the region is deeply rooted, and celebrations of Catholic holidays attract large numbers of the faithful, highlighting local traditions. Historically, this area has witnessed many events, from the times of the Polish-Lithuanian Commonwealth to the period of World War II, which is reflected in numerous monuments and memorial sites. Interestingly, the deanery borders other significant areas, such as Bielsk Podlaski and Drohiczyn, which also boast rich religious and cultural heritage. Siemiatycze is a place where history, religion, and local tradition coexist, creating the unique character of the region.