Arco Trionfale fatto erigere..alle glorie della Santita di N. S. Innocenzo XIII

Arnold van Westerhout or Arnoldo van Westerhout (Antwerp, 21 February 1651 – Rome, 18 April 1725) was a Flemish printmaker, painter, draughtsman, publisher and printer. He trained in Antwerp but mainly worked abroad, and in particular in Italy. He settled in Rome where he was a prominent printmaker and publisher. The artist is less known for his paintings, which covered religious and genre subjects, than for his work as a printmaker and publisher. Arnold van Westerhout was born in Antwerp. As he showed a talent for drawing at a young age, his father placed him in apprenticeship with Alexander Goetiers (1637–1686), also of Antwerp. Arnold's younger brother Balthasar later also apprenticed with Goetiers. Arnold was registered as an apprentice in the records of the Guild of Saint Luke of Antwerp in the guild year 1665–1666. He became a master of the Guild in the guild year 1673–1674 and was registered as a painter. Arnold allegedly worked from 1665 to 1673 in Prague in the studio of his older brother Alexander, which must then have been during his period of apprenticeship. While in Antwerp Arnold worked mainly as a draughtsman and as an engraver of portraits after his own design or those of other masters. In 1675 he drew the title plate of an illustrated work on mushrooms, the Theatrum fungorum oft Het toneel der campernoelien by Frans van Sterbeeck which was published in Antwerp in the same year by Jozef Jacobs. Van Westerhout had left Antwerp and was residing in Venice in 1679. Here he worked on some publications of the publisher Giovanni Palazzi (1640–1703) in collaboration with his fellow Antwerp engravers Pieter van Sickeleers and Cornelis van Merlen. An example is the Aquilae Austriacae pars secunda published in 1679 in Venice, which contains illustrations engraved by Pieter van Sickeleers and Cornelis van Merlen after designs by Arnold van Westerhout. By 1681 van Westerhout had left Venice and was living in Rome. Here he is recorded as living in the residence of the Dutch painter and engraver Cornelis Bloemaert. He maintained a workshop near the Church of St. Ignatius of Loyola at Campus Martius. Cornelis Bloemaert named him the executor of his will. Cornelis Bloemaert died in 1692. From 1685–86 the printer Jacques Blondeau lived with van Westerhout. Not long after moving to Rome, van Westerhout was able to become one of the city's most prominent engravers. He bought the stock of French engraver, print-seller and publisher François Collignon in 1687. One of his biggest assignments was the engraved illustrations of Giovanni Ciampini's Vetera Monimenta, an illustrated history of mosaics. Van Westerhout cut the engravings after drawings by Giovanni Battista Lenardi. The first volume of this work was published in 1690. Lenardi and van Westerhout collaborated for several years on other projects, including a large canvas entitled the Theological Allegory with the Assumption of the Virgin (Liverpool, Walker Art Gallery). During the 1680s and between 1693–1719, he lived in Salita di S.Giuseppe at Capo le Case near the parish of Sant'Andrea delle Fratte. His prints in the period from 1686 to 1697 mention the address 'alli Cesarini', which suggests that he had a shop there. He was in Florence for a brief period from the end of 1691 to early 1692 before returning to Rome. From that time onwards he referred to himself as the 'engraver to Grand Prince Ferdinando de' Medici' until Ferdinando's death in 1713. From 1716, he was granted the title of official engraver of the Duke of Parma. In the period from 1720 to 1725 the artist lived in Rome at Vicolo de Chiodarolli, in the Via delle Muratte, near the Trevi Fountain. Arnold was married twice in Italy. In Florence he married Angela de Pulco from Cittâ di Castello and in Rome he married Magdalena Antonini, the widow of Danieli, from Fiano. He died without an heir in Rome on 18 April 1725. His stock was taken over by the Roman merchant Giacomo Billy, who had a shop near the Santa Maria in Vallicella church (the Chiesa Nuova). In the “Vite Di Pittori” written by Francesco Maria Niccolò Gabburri between 1730 and 1742 a nephew of Westerhout is mentioned. This nephew trained with him in etching and engraving and lived and worked in Florence. Here he is said to have etched, among other things, the famous city views painted by Giuseppe Zocchi. The Italian engraver Giovanni Girolamo Frezza studied engraving and etching in the workshop of van Westerhout in Rome.