May 1555 papal conclave
1555 CE.
Shown on the map at 41.904°, 12.456°.
The May 1555 papal conclave (15–23 May) was convened on the death of Pope Marcellus II (whose reign had only lasted from 9 April to 1 May that year) and elected Pope Paul IV as his successor.
Text from the Wikipedia article May 1555 conclave, licensed CC BY-SA 4.0.