Charles, who invited him to England in 1628. There he painted several portraits, and a vast allegory, now at Hampton Court, of Charles and his queen as Diana and Apollo in the clouds receiving the Duke of Buckingham as Mercury and guardian of the King of Bohemia's children. He painted a more intimate group portrait of The Four Eldest Children of the King of Bohemia, (also at Hampton Court) in which the two eldest are depicted as Diana and Apollo. After his return to Utrecht, Honthorst retained the patronage of the English monarch, painting for him, in 1631, a large picture of the king and queen of Bohemia and all their children. At around the same time he painted some pictures illustrating the Odyssey for Lord Dorchester, and some showing incidents of Danish history for Christian IV of Denmark. He also painted a portrait of the king's daughter Countess Leonora while she was in the Hague. His popularity in the Netherlands was such that he opened a second studio in the Hague, where he painted portraits of members of the court, and taught drawing. These large studios, where the work included making replicas of Honthorst's royal portraits, employed a large number of pupils and assistants; according to one pupil, Joachim von Sandrart, describing his experiences in the mid-1620s, Honthorst would have about 24 students at any one time, each paying 100 guilders a year for their education. His brother Willem van Honthorst (1594–1666) was also a portrait painter. Many of Willem's paintings were previously misattributed to Gerrit due to the similarity of their signatures. Willem was a pupil of Abraham Bloemaert, and was also taught by his own elder brother. In 1646 he went to Berlin, where he became court painter to Louise-Henriette, wife of the elector Frederick II of Brandenburg. He returned to Utrecht in 1664. Nickname Honthorst is often referred to as "Gherardo delle notti" ("Gerrit of the Nights") by modern Italians. However, the nickname does not actually appear in any known Italian sources dating before Honthorst's death. Surviving Italian documents from before 1656 refer to the artist as either "Gherardo Fiammingo" ("Gerrit the Fleming") or "Gherardo Hollandese" ("Gerrit the Dutchman"), emphasizing his foreignness rather than his trademark skill at rendering nocturnal lighting. It was only in the 18th century that the nickname "Gherardo delle notti" came into widespread use. Legacy Honthorst was a prolific artist. His most