which provide important insights into De Keyser's work. He cooperated with Hendrick Jacobsz. Staets en Cornelis Danckertsz. His Commodity Exchange of 1608-1613 was pulled down in the 19th century. The East India House in Amsterdam was most likely also designed by him; later extensions were done by his sons. In the year 1616 he renovated the Bank van Lening. The renovation of the Waag took place in 1617 according to his design; in 1619 the Munttoren was prepared for adding a clock. Hendrick de Keyser's projects in Amsterdam during the early decades of the 17th century helped establish a late Mannerist style referred to as "Amsterdam Renaissance". He could be influenced by Paul Vredeman de Vries. The Amsterdam Renaissance style deviates in many respects from sixteenth-century Italian Renaissance architecture. Classical elements such as pilasters, cornices and pediments were used on a large scale, but mainly as decorative elements. De Keyser never slavishly followed the tenets of classical architecture as laid down in the Italian treatises by Serlio and Palladio. His version came to full bloom at the end of the second decade of the 17th century, and set the stage for the later Dutch classical phase of Jacob van Campen and Pieter Post. Apart from pursuing a career as an architect, De Keyser remained active as a sculptor. He designed the tomb of William the Silent for the Nieuwe Kerk (Delft) (1614-1623). However, De Keyser did not live to see the finished product. His son Pieter, who inherited his tools and designs, completed his work. In 1631 Salomon de Bray included the architect's most important sketches, based on mathematical regularity, in his book ’Architectura Moderna’. De Keyser's career was not limited to Amsterdam, and his international contacts helped him to keep in touch with the mainstream of European architecture. In 1607 the Amsterdam city magistrates sent him to England; it is believed he worked with Inigo Jones? When De Keyser and Danckerts returned to Amsterdam Nicholas Stone, joined them. For several years Stone worked with De Keyser and even became his son-in-law in 1613. His grandson Henry Stone (painter) studied with Thomas de Keyser. De Keyser died on his birthday and was buried in the nearby Zuiderkerk. List of works 1603: Rasphuispoortje, Amsterdam. The decoration on the top is not by HdK and dates from 1663. 1606: Oost-Indisch Huis, Amsterdam. The attribution to HdK is uncertain. 1606: Montelbaanstoren, Amsterdam. 1606-1611: