Calendar

From Galileo to Laudato Si’: Why Science Needs Faith

St. Ignatius Parish 650 Parker Avenue, San Francisco, CA, United States

Br. Guy Consolmagno, S.J. to give a lecture on Thursday, March 23, 2023, 6:30 PM at St. Ignatius Parish in San Francisco, CA

Annunciation of the Lord

The Feast of the Annunciation, in Greek, Ο Ευαγγελισμός της Θεοτόκου, contemporarily the Solemnity of the Annunciation, and also called Lady Day, the Feast of the Incarnation (Festum Incarnationis), or Conceptio Christi (Christ’s Conception), commemorates the visit of […]

Tullio Levi-Civita, born 1873

Tullio Levi-Civita, ForMemRS (English: /ˈtʊlioʊ ˈlɛvi ˈtʃɪvɪtə/, Italian: ; 29 March 1873 – 29 December 1941) was an Italian mathematician, most famous for his work on absolute differential calculus (tensor calculus) and its applications to the theory of relativity, but who […]

Francesco Zantedeschi died 1873

Francesco Zantedeschi (August 20, 1797 – March 29, 1873) was an Italian Catholic priest and physicist. A native of Dolcè, near Verona, Zantedeschi was for some time professor of physics and philosophy in the Liceo of Venice. Later he accepted the […]

April Fools Day.

April Fools' Day or April Fool's Day (sometimes called All Fools' Day) is an annual celebration on April 1, commemorated by practical jokes and hoaxes. The player(s) of the joke(s) or hoax(es) often exposes their action by […]

Official Calendar

2025 VO Calendar

Vatican Observatory 2025 astrophoto calendars now available for purchase in our e-store!