Placidus de Titis [SEP] place of death
Placidus de Titis
Placidus de Titis (also "de Titus", Latinization of Placido de Titi, pseudonym "Didacus Prittus Pelusiensis";1603–1668) was an Olivetan monk and professor of mathematics, physics and astronomy at the University of Pavia from 1657 until his death.
Placidus popularized the system of astrological houses now known as the "Placidian system", current in modern astrology. 
He did not invent the method; it is acknowledged by the 12th century Hebrew astrologer Abraham Ibn Ezra as the system employed by Ptolemy, an attribution
Placidus
Placidus is Latin for "placid, gentle, quiet, still, calm, mild, peaceful" and can refer to:
- Flavius Arcadius Placidus Magnus Felix (480–511), Consul of Rome
- Placidus de Titis (also de Titus, Latinization of Placido de Titi, 1603–1668), astrologer
- Placidus Böcken (1690–1752), German Benedictine canon lawyer, Vice-Chancellor of the University of Salzburg
- Placidus Braun (1756–1829), Bavarian Benedictine priest, historian and archivist
- Placidus Fixlmillner