Johannes Grubenmann
Johannes Grubenmann ( 15 June 1707 – 10 June 1771 ) was a member of the Swiss family Grubenmann who were famous as carpenters and civil engineers in the eighteenth century . 
<triplet> Johannes Grubenmann <subj> 15 June 1707 <obj> date of birth <subj> 10 June 1771 <obj> date of death