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Encyclical on the Rosary

When: 1 September 1883
Where: Place of issuance not stated in supplied sources
Part of: Pope Leo XIII publishes Supremi apostolatus officio on the Rosary

Pope Leo XIII issued Supremi apostolatus officio on 1 September 1883, encouraging the practice of the Rosary.

This encyclical, titled "The Supreme Apostolic Office," was the first of several documents Leo XIII wrote on the Rosary. It was issued on 1 September 1883 and encouraged the practice of the Rosary. The legacy location 'Vatican City, Vatican' is anachronistic, as Vatican City did not exist until 1929; the supplied passages do not name a place of issuance, so the occurrence site remains unresolved.

Sources

Supremi apostolatus officio Wikipedia, revision of 2026-06-16
Pope Leo XIII Wikipedia, revision of 2026-10-04

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.