Pietro Pitati
Encyclopedia
For the painter Bonifazio de' Pitati, see Bonifazio Veronese
Bonifazio Veronese
Bonifazio Veronese was an Italian painter. He was born as Bonifazio de' Pitati in Verona. He reputedly trained under Palma il Vecchio. Went on to run a large workshop in Venice. His paintings include Christ Giving a Sermon, , The , and Woman Holding Two Tablets, his style being influenced by...

.

Pietro Pitati (in Latin
Latin
Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

, Petrus Pitatus) (?-fl. ca. 1550) was an Italian
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 astronomer and mathematician. Bernardino Baldi, in his Cronica de matematici (1707) calls Pitati a noble Veronese
Verona
Verona ; German Bern, Dietrichsbern or Welschbern) is a city in the Veneto, northern Italy, with approx. 265,000 inhabitants and one of the seven chef-lieus of the region. It is the second largest city municipality in the region and the third of North-Eastern Italy. The metropolitan area of Verona...

 who was trained in mathematics by a Benedictine
Order of Saint Benedict
The Order of Saint Benedict is a Roman Catholic religious order of independent monastic communities that observe the Rule of St. Benedict. Within the order, each individual community maintains its own autonomy, while the organization as a whole exists to represent their mutual interests...

 friar named Innocentio da Novara.

It is known that he was the author of several astronomical works and almanac
Almanac
An almanac is an annual publication that includes information such as weather forecasts, farmers' planting dates, and tide tables, containing tabular information in a particular field or fields often arranged according to the calendar etc...

s. His Paschales atque nouiluniorum mensurni canones. De varia paschalis solemnitatis obseruatione...De Hebraica anni quantitate...Calendarium nouum cum noua aurei numeri positione, ortu quoque
UE
Ue may refer to:* Ue , a digraph used in some writing systems. Its variant Ü is a letter representing a vowel in the Estonian, German, Hungarian, and Turkish alphabets, and in pinyin* Ue , letter in many Asian languages...

, & occasu stellarum fixarum (Venice
Venice
Venice is a city in northern Italy which is renowned for the beauty of its setting, its architecture and its artworks. It is the capital of the Veneto region...

, March 1537) is one of many sixteenth century attempts to reform the calendar
Calendar
A calendar is a system of organizing days for social, religious, commercial, or administrative purposes. This is done by giving names to periods of time, typically days, weeks, months, and years. The name given to each day is known as a date. Periods in a calendar are usually, though not...

, and establish, among other things, the correct day of Easter
Easter
Easter is the central feast in the Christian liturgical year. According to the Canonical gospels, Jesus rose from the dead on the third day after his crucifixion. His resurrection is celebrated on Easter Day or Easter Sunday...

. This was his first work.

Pitati also wrote another book bearing on the length of the solar and lunar year, the fixed stars, and calendar reform, entitled: Compendium . . . super annua solaris atque lunaris anni quantitate Paschalis item solennitatis juxta veteres ecclesiae canones recognitione Romanique calendarii instauratione deque vero Passionis Dominicae die ortu quoque et occasu stellarum fixarum, in tres divisum Tractatus. Pitati's proposal for calendar reform "pleaded for the rule whereby three out of four centennial years be ordinary (non leap-years). This is [now] the Gregorian rule."

Pitati compiled ephemerides, to which he added supplements over the years, such as Almanach nouum...Superadditis annis quinque supra ... Ephemeridas 1551. ad futurum Christi annum 1556. Isagogica in coelestem Astronomicam disciplinam ... Tractatus
tres perbreues de Electionibus, Reuolutionibus annorum, & mutatione aeris. Item horariae tabulae per altitudinem solis in die, ac stellarum in nocte ad medium sexti climatis.(Venice
Venice
Venice is a city in northern Italy which is renowned for the beauty of its setting, its architecture and its artworks. It is the capital of the Veneto region...

, 1542).

The lunar crater Pitatus
Pitatus (crater)
Pitatus is an ancient lunar impact crater located at the southern edge of Mare Nubium. Joined to the northwest rim is the crater Hesiodus, and the two are joined by a narrow cleft. To the south lie the attached Wurzelbauer and Gauricus....

 is named after him. The mathematician and astronomer Giovanni Padovani
Giovanni Padovani
Giovanni Padovani was an Italian mathematician and astronomer. He lived in Verona and was a student of Pietro Pitati...

was a student of Pitati.

Sources

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