Report from Dr. Klaus Ertz, Lingen, dated July 28, 2023, in which he determines that the painting was made in Italy in the last decade of the 16th century. The seated Mary is enthroned with her child on her lap in a tiered outdoor area, which ends at the top in two mighty round columns, which are surmounted by Corinthian capitals and connected by a red velum. Around her are numerous angels, some of whom are playing music, and to the right of them is Saint Catherine, stretching out her hand to the Christ child. What is primarily shown here is the mystical marriage of Catherine of Alexandria, who receives the ring from the child Jesus. The angels and cherubim depicted on all sides are individualized. Calvaert, who was born in Antwerp, was initially a landscape painter and then trained as a figure painter in Bologna under, among others, Antonio Allegri Correggio (around 1489-1534) and Tibaldi da Bologona (1527-1596). In addition to large-format works, the pictures painted on copper were particularly successful at the time. Oil on copper. 50.5x35cm.