<P> In 1615 Zacharias was appointed guardian of two children of Lowys Lowyssen "geseyt Henricxen brilmakers" (called Henry the spectacle maker). It is surmised that Zacharias also took possession of Lowys Lowyssen's spectacle - making tools because the first record of Zacharias Janssen being a spectacle maker appears in 1616 . The family had to move to Arnemuiden in 1618 after Zacharias's counterfeiting activities were exposed . There Zacharias was again accused of counterfeiting in 1619 causing him to be on the move again, ending up back in Middleburg in 1621 . </P> <P> A year after the death of Janssen's first wife in 1624, he married Anna Couget from Antwerp, who was the widow of a Willem Jansen (probably a relative of Janssen). He moved to Amsterdam in November 1626 with a profession of a spectacle maker, but was bankrupt by 1628 . Janssen has been given a death date as late as 1638 although his sister said he was dead in 1632 testimony and his son Johannes declared his parents had died by the time of his marriage in April 1632 . </P> <P> Over the years there have been claims Zacharias Janssen invented the telescope and / or the microscope in Middelburg between 1590 and 1618 . Zacharias worked for some period of his life as spectacle - maker (a very competitive and secretive trade) and at one time lived next door to Middelburg spectacle maker Hans Lippershey, also claimed to have invented the telescope . Janssen's attribution to these discoveries is debatable since there is no concrete evidence as to the actual inventor, and there are a whole series of confusing and conflicting claims from the testimony of his son and fellow countrymen . </P> <P> The claim that Zacharias Janssen invented the telescope and the microscope dates back to the year 1655 . During that time Dutch diplomat Willem Boreel conducted an investigation trying to figure out who invented the telescope . He had a local magistrate in Middelburg follow up on a 45 year old recollection of a spectacle maker named "Hans" who told a young Boreel in 1610 about inventing the telescope . In his investigation the magistrate was contacted by a then unknown claimant, Middelburg spectacle maker Johannes Zachariassen, the son of Zacharias Janssen, who testified under oath that his father invented the telescope and the microscope as early as 1590 and that Hans Lippershey had stolen his father's invention of the telescope . This testimony seemed to convincing to Boreel, who modified his recollections, concluding that Zacharias must have been who he remembered . Boreel's conclusion that Zacharias Janssen invented the telescope a little ahead of spectacle maker Hans Lippershey was adopted by Pierre Borel in his 1656 book on the subject . </P>

Who is credited with inventing the first microscope
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