The paper offers a view at the representation of mathematical and astronomical works in the library of the Jesuit College in Bratislava in the 17th century. The Jesuit residence in Bratislava was founded on the initiative of Peter Pázmáň, Archbishop of Ostrihom, in 1626. In 1631 the residence was promoted to college. This year, the number of grades was completed for the first time, and a 5-year educational high school cycle could begin. The Jesuit Residence Library, later the College, had begun to be built before the official establishment date of the residence, between 1624 and 1625. The first book donors include Jacob Csepreghy, Marek Walticher, Peter Pázmáň and Ján Kečkéš. Preserved manuscript catalogues inform about the scope and content of the fund in the 17th century. The first catalogue was compiled in 1639 and records 1407 titles. The origin date of the second catalogue is not mentioned, it was created between 1655 and 1663 and records 2184 titles. The catalogue of 1639 records 50 titles and the catalogue of 1663 74 titles of prints from mathematics and astronomy.
The primary sources of the research were the prints of the 16th century preserved in the University Library in Bratislava (UKB), two secondary manuscript catalogues. Seven mathematics prints have been preserved in the UKB – the work of Old Greek mathematician Euclid and contemporary mathematicians Konrad Dasypodius, Johannes Piscator and Michael Stifel. The catalogues record the work of others – Cuthbert Tunstall, Rainer Gemma Frisius, and Klaudios Ptolemaios. The work of the most important Jesuit mathematicians – Christopher Clavius, Christoph Grienberger, Christoph Scheiner – is missing. From astronomical works, Jesuits used the works of ancient Greek polyhistor Aristotle and the medieval educator of English origin Johannes de Sacrobosco. These were also preserved in the UKB Fund, along with the works of astronomers Hartmann Beyer, Georg Peurbach, Erasmus Reinhold Sen., Johannes Stöffler, Michael Mästlin and Nikodem Frischlin. There are other works in catalogues, f. e. Islamic medieval astronomers Fargani and Kabisi, Czech renaissance astronomer Tadeáš Hájek of Hájek, and Slovenian astronomers A. Perlach and A. Kobav. The rich representation of mathematical and astronomical presses in the library of the Jesuit College in Bratislava exceeded the user’s needs of the school because mathematics was not taught at college; it was a subject of university studies.