Frederik Grisogono (born in Zadar, 1472-1538), a mathematician, physicist, astronomer and physician, was educated in Padova, where later he became a university professor. His commentaries on Euclid’s `Elements’ were published in his book Speculum astronomicum terminans intellectum humanum in omni scientia, Venice in 1507. His most important contribution was the theory of tides, based on the attraction of the Moon, which influenced Mark Antun Dominis. He discovered the antipodal tidal wave. His theory of tides is described in De modo collegiandi, pronosticandi et curandi febres, nec non de humana felicitate ac denique de fluxu et refluxu maris, Venice 1528.