who was he?
an Italian Renaissance humanist author, artist, architect and poet.
Leon Battista Alberti
Leon Battista Alberti (; February 14, 1404 – April 25, 1472) was an Italian Renaissance humanist author, artist, architect, poet, priest, linguist, philosopher and cryptographer; he epitomised the Renaissance Man. 
what is wind? The flow of gases on a large scale. what is the reason behind the flow? It is caused by differences in atmospheric pressure. how is it measured? By anemometers. what is this thing? A device used for measuring wind speed and direction. by whom was it developed? Leon Battista Alberti
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Leon Battista Alberti [SEP] Introduction
Leon Battista Alberti (; February 14, 1404 – April 25, 1472) was an Italian Renaissance humanist author, artist, architect, poet, priest, linguist, philosopher and cryptographer; he epitomised the Renaissance Man. Although he is often characterized exclusively as an architect, as James Beck has observed, "to single out one of Leon Battista's 'fields' over others as somehow functionally independent and self-sufficient is of no help at all to any effort to characterize Alberti's extensive explorations in the fine arts." Although Alberti is known mostly for being an artist, he was also a mathematician of many sorts and made great advances to this field during the 15th century.