A famous Boazumer (although mainly by proxy) was the reverend
Eelco Alta (1723-1798), whose treatise
Philosophical Considerations concerning the Conjunction of the Planets Jupiter, Mars, Venus, Mercury and the Moon. To be happening on the Eighth of May 1774, and about the Possible and Likely Astronomical and Physical Consequences of this Conjunction from 1774 was long said to have motivated
Eise Eisinga to build his famous
planetarium. According to the canonicised view, Alta stated that the upcoming conjunction of the planets with the sun would herald the
apocalypse, and through his planetarium, Eisinga was able to prove that in fact, the conjunction would not take place. Modern research has however come to the more prosaic conclusion that Eisinga was mainly motivated by practical motives - most of all not having to calculate the orbits and respective positions of the planets and the sun on paper, but instead using his planetarium as a reference. ==Notable buildings==