Nikolaas van Hoy, known in Austria as Nikolaus van Hoy (alternative spellings of family name: 'van Hoey' and 'van Hoj') (b. Antwerp, 1631 - d. Vienna, 25 June 1679) was a Flemish Baroque painter, draughtsman and etcher.
He was born in Antwerp. He likely trained in Antwerp. He worked in Brussels between 1647 - 1655. He is also reported to have spent some time in Rome. He went to Vienna in 1657, possibly with the Dutch painter Jan van Ossenbeeck whom he would have met in Rome and had later joined him in Brussels.
At about 1667 he became the court painter of Leopold I, Holy Roman Emperor and the Archduke Leopold Wilhelm of Austria. He retained this post until his death in Vienna in 1679.
He was succeeded at the court by his son Nickolaus van Hoey the Younger (Antwerp 1660- Vienna ca. 1710).
He made landscapes and portraits.
He engraved religious scenes and mythological figures adapted from originals of Veronese, Barocci and Raphael. He was one of the artists and engravers who collaborated with David Teniers the Younger on the publication entitled "Theatrum Pictorium", a catalogue of the picture gallery of Archduke Leopold Wilhelm. Abraham Teniers published the first edition in 1658 as loose leaves and unnumbered. The first part with 244 etchings of Italian pictures was published in Brussels in 1660, while the gallery was already in Vienna. The publication ends with an engraving by Frans van der Steen after a drawing by Nicolaus van Hoy of a view of the Stallburg gallery of the Archduke. Van Hoy was also responsible for individual engravings in the publication.
He made a series of 13 engravings of cavalcades or equestrian ballets, which were later remade by Jan van Ossenbeeck. The prints of cavalcades by Nicolaus van Hoy were published in Francesco Sbarra's 'La Contessa dell' Aria e dell' Aqua festa a cavallo rappresentata nell' augustissime nozze dell M.M. dell'Imperatore Leopold e dell' Infante Margherita della Spagne' in 1667.