Schema voor het bepalen van de zondagsletter (littera dominicalis) before 1525

This anonymous woodcut, created before 1525, is a "Schema voor het bepalen van de zondagsletter (littera dominicalis)," a diagram for determining the dominical letter. The intricate design features a circular chart with various concentric rings, numbers, and letters, all contained within a square frame. In the center of the chart, a winged creature stands out, likely representing the passage of time or the celestial nature of the calculation. The use of the dominical letter was a common practice in medieval and early modern Europe to determine the day of the week on which a specific date fell. This artwork reflects the complex interplay of astronomical and liturgical knowledge during this period.