To the north of St. Peter’s Square in the Vatican stands a tall structure called the Tower of the Winds, also referred to as ...

Benedict IX, a pope in the 11th century, holds the rare distinction of becoming a pope three times, selling the papacy, being ...

Peter was the first pontiff of the Catholic church, and several popes have been considered "great" in the interim.

The alignment of Easter in Western and Eastern branches of Christianity, along with a 1,700-year anniversary, have renewed ...

Another popular theory links the tradition to the 16th-century calendar reforms. Pope Gregory XIII ordered Christian nations ...

The Gregorian calendar, instituted by Pope Gregory XIII, went into effect in 1582. In the 1,417 years from 1583 through 3000, ...

But the two churches started using different calendars after Pope Gregory XIII’s adaptation in 1582, when the Western church adopted the Gregorian calendar while the Eastern Orthodox Church kept ...

The Gregorian calendar, instituted by Pope Gregory XIII, went into effect in 1582. In the 1,417 years from 1583 through 3000, it’s most common for Easter to fall on April 16, with 61 instances.

The Eastern Orthodox and Roman Catholic observances overlap only every three to four years thanks to different church calendars — and different lunar cycle calculations.

I've been doing everything I can to get in touch with Pope Gregory XIII about fixing the Gregorian calendar, but I haven't had much luck yet. I'll keep trying his cell, but in the meantime ...