Agnes Mary Clerke,
1911 Encyclopædia Britannica, Volume 13…
(1911)
“ HEVELIUS [Hevel or Höwelcke] , JOHANN (1611–1687) , German astronomer, was born at Danzig on the 28th of January 1611. He studied jurisprudence at Leiden in 1630; travelled in England and France; and in 1634 settled in his native town as a brewer and town councillor. From 1639 his chief interest became centred in astronomy, though he took, throughout his life, a leading part in municipal affairs. In 1641 he built an observatory in his house, provided with a splendid instrumental outfit, including ultimately a tubeless telescope of 150 ft. focal length, constructed by himself. ”
