NEW BOOK · BLOOMSBURY · SPRING 2027

WHITE SMOKE

How Conclaves Shaped the Papacy
over Two Thousand Years

For two thousand years, every papal election has confronted the Catholic Church with the same question: what sort of pope does this moment require?

St Peter’s Basilica, Rome, viewed from the Janiculum Hill (2007). Photograph © Stivi / Wikimedia Commons, CC BY-SA 4.0. Cropped for display
White smoke from the Sistine Chapel during the 2025 papal conclave
ROME · 8 MAY 2025 · 6:07 PM

Fumata bianca.

White smoke billowed from the Sistine Chapel. Bells rang across St Peter's Square. Thousands waited to discover who the cardinals had chosen.

The conclave had reached its decision after only four ballots.

Robert Francis Prevost.

Leo XIV.

The choice surprised almost everyone.

But surprise is part of the history of the conclave.

THE ARGUMENT

Popes come and go.
The papacy survives.

The papacy presents itself as an institution of extraordinary continuity. Yet its survival has depended on an equally extraordinary capacity to change.

Conclaves made that possible.

Each vacancy gave the Church an opportunity to reassess its direction. Each election balanced continuity against rupture, tradition against innovation, the accumulated weight of the past against the needs of an unknowable future.

Mortality became a mechanism of institutional renewal.

FOUR PARTS · TWO THOUSAND YEARS
Papal conclave, illustration from the Nuova Cronica, Biblioteca Vaticana, MS Chigiano L VIII 296. Wikimedia Commons, public domain
I

Origins

Who gets to choose the pope?

From Roman crowds and emperors to the College of Cardinals: how centuries of conflict created the rules of papal election.

Pinturicchio, Enea Silvio Piccolomini departs for the Council of Basel, Piccolomini Library, Siena Cathedral. Photograph © Wolfgang Moroder / Wikimedia Commons, CC BY-SA 3.0. Cropped for display
II

Rivalries

What happens when there is more than one pope?

Schisms, rival claimants and Renaissance dynasties: papal elections as struggles for power, wealth and the future of the Church.

Pieter Boel, Allegory of the Vanities of the World (1663). Palais des Beaux-Arts, Lille. Image: Wikimedia Commons, public domain
III

Ascendancies

Who really controlled the conclave?

Monarchs, ambassadors and cardinals: shaping the papacy in a time of religious conflict and great power politics.

Cardinals look out from the dome of St Peter’s towards the square. Photograph © Ross Dunn / Wikimedia Commons, CC BY-SA 2.0. Cropped for display
IV

Transformations

How did the papacy survive the modern world?

From the loss of temporal power to the triumph of global Catholicism: how the conclave became an international spectacle and helped remake modern popes.

THE MEN WHO MAKE POPES

An absolute monarch
who cannot choose his heir.

The pope appoints the cardinals. The cardinals elect the pope. Yet neither can exercise his power without the other.

This extraordinary balance between pope and College has helped preserve the papacy through centuries of rivalry, crisis and reform.

St Peter's College, Oxford
ABOUT THE AUTHOR

Miles Pattenden

Miles Pattenden is a historian of the Catholic Church and modern Europe. He teaches Modern History at St Peter's College in the University of Oxford and is the author of Electing the Pope in Early Modern Italy and a contributor to The Cambridge History of the Papacy.

His historical analysis of papal elections and Catholicism has featured across international television, radio and print media.