Leonhard Euler died in Saint Petersburg, Russian Empire, after collapsing during a discussion about the newly discovered planet Uranus. His death marked the end of a prolific career in mathematics and science.

Date of Leonhard Euler death according to Old Style calendar.

Leonhard Euler married Katharina Gsell, the daughter of Georg Gsell, a painter at the Academy Gymnasium in Saint Petersburg. This marked an important event in his personal life.

Nicolaus Bernoulli dies of appendicitis after spending less than a year in Russia. This event created an opening for Euler at the Imperial Russian Academy of Sciences in Saint Petersburg.

Leonhard Euler was born in Basel, Swiss Confederacy, to Paul III Euler, a pastor of the Reformed Church, and Marguerite (née Brucker). He was the oldest of four children. This marks the beginning of the life of one of the most influential mathematicians in history.