Adriaan van Roomen

Adriaan van Roomen (29 September 1561 – 4 May 1615), also known as Adrianus Romanus, was a mathematician, professor of medicine and medical astrologer from the Duchy of Brabant in the Habsburg Netherlands who was active throughout Central Europe in the late 16th and early 17th centuries.

His publication of 1595, Parvum theatrum urbium, contained Latin verse on the cities of Italy (possibly written by Thomas Edwards).

[3] At the same time, he served as mathematician of the king of Poland and become famous for the computation of the value of pi to sixteen decimals,[4][5] surpassing François Viète who had arrived at ten digits.

In June 1610 he was in Prague, after which he travelled to Poland at the invitation of Jan Zamoyski to give public lectures on mathematics at Zamość in Red Ruthenia.

[1] Struggling with health problems, Van Roomen undertook a journey to Spa to take the waters but died en route at Mainz in the arms of his son, who was travelling with him.