Portrait of Queen Henrietta Maria, as St Catherine is a painting by Sir Anthony van Dyck.

The portrait of Queen Henrietta Maria, as St. Catherine of Alexandria was painted by van Dyck around 1639.

[3][4] Philip Mould owned a portrait of Queen Henrietta Maria in a blue dress.

An X-ray suggested that Mould's portrait contained a smaller original which had been enlarged and over painted in the 18th century.

[3][6] Removal of the over-painting revealed an unfinished portrait of the Queen as St Catherine, which was subsequently attributed to Van Dyck at the conclusion of the programme by Dr Christopher Brown, director of the Ashmolean Museum and an authority on van Dyck.