Leonhard Euler's father was Paul Euler. Paul Euler had studied theology at the University of Basel and had attended Jacob
Bernoulli's lectures there. In fact Paul Euler and Johann Bernoulli had both lived in Jacob Bernoulli's house while undergraduates
at Basel. Paul Euler became a Protestant minister and married Margaret Brucker, the daughter of another Protestant minister.
Their son Leonhard Euler was born in Basel, but the family moved to Riehen when he was one
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in when he was appointed director of the St Petersburg Academy's
geography section in 1735. He had the specific task of helping Delisle prepare a map of the whole of the Russian Empire. The
Russian Atlas was the result of this collaboration and it appeared in 1745, consisting of 20 maps. Euler, in Berlin by the time of
its publication, proudly remarked that this work put the Russians well ahead of the Germans in the art of cartography.