Legal acts of the regional councils represent the legal and official style. These documents contain numerous references to the sacred, which is the result of the communication convention in force in the Middle-Polish period and Sarmatian culture, represented by the participants of this communication. The Sejmiks were most often held in the church. The dating of documents also contained religious elements. Officials applied temporal terms determined by the liturgical calendar. The sacral motifs appear in many acts of speech, both polite (in titles, wishes, thanks) and performative (in oaths). The image of God in documents is similar to God’s image in literary works. God is seen above all as a creator, donor, ruler, guardian and judge. His traits are, for example, justice, kindness and mercy.