Born in Bamberg, Germany, I joined the Jesuit order in 1555.
I attended the University of Coimbra in Portugal, where I was tutored by the famous mathematician Pedro Nunes.
I am responsible for the adoption of a rigorous mathematics curriculum within the Jesuit order, despite it being an age when mathematics was often ridiculed by philosophers and theologians.
I was the first person to use decimal points in publishing goniometric tables used to measure angles for computing altitudes of objects.
As an astronomer who knew and respected Galileo, I stubbornly backed the geocentric model of the solar system, even though I admitted there were problems with a view of the planets rotating around the earth.
I was the main architect of the modern Gregorian calendar, being assigned the task to halt the slow drift of the Church's holidays away from the seasons of the year.
Christopher Clavius (1538 - 1612)