Blog

Blogs, essays, updates, and occasional notes that sit alongside The Butterfly Effect.

Portrait of Girolamo Savonarola

The Prophet Who Tried to Burn the Renaissance

May 23, 2026 By Andy Barca

On 23 May 1498, Girolamo Savonarola was hanged and burned in Florence. His rise as a democratic theocrat and his fall under a corrupt pope expose the dark populist currents of the Renaissance and the birth of modern realpolitik.

Illustration of the death of the Duke of Somerset at the First Battle of St Albans, 1455

The War Nobody Meant to Win

May 22, 2026 By Andy Barca

On 22 May 1455, Richard Duke of York defeated and captured King Henry VI at the First Battle of St Albans, opening thirty years of dynastic warfare. Nobody who fought those wars expected them to produce Henry Tudor, a centralised state, and the English Renaissance.

Painting of the defence of the breach at Saint-Jean-d'Acre, 8 May 1799, by Thomas Sutherland

The General Who Left

May 21, 2026 By Andy Barca

On 21 May 1799, Napoleon Bonaparte abandoned the siege of Acre after two months of failed assaults and retreated to Egypt. Three months later he abandoned his army entirely and sailed for France. In any other era, that would have ended his career.

Colossal statue of Constantine the Great, who convened the Council of Nicaea

The Meeting That Made Christianity

May 20, 2026 By Andy Barca

On 20 May 325, the Emperor Constantine convened roughly 300 bishops at Nicaea to end a theological dispute that was threatening imperial unity. The creed they drafted is still recited in churches today. The argument they tried to close took another fifty years to resolve.

Portrait of Anne Boleyn

The Queen Who Cost England Its Church

May 19, 2026 By Andy Barca

On 19 May 1536, Anne Boleyn was beheaded on Tower Green for crimes everyone knew she had not committed. The execution cleared a path for Jane Seymour, but the real inheritance was a bastard daughter who would rule England for forty-five years.

Portrait of Jean Parisot de Valette, Grand Master of the Knights Hospitaller during the Great Siege of Malta

What the Son Cost

May 18, 2026 By Andy Barca

On 18 May 1565, Suleiman the Magnificent sent 40,000 men to take Malta. A handful of Knights and Maltese held them for four months. The bill for a single small fort should have told the Ottomans everything.

Portrait of Pánfilo de Narváez

Four From Six Hundred

May 17, 2026 By Andy Barca

On 17 May 1527, Pánfilo de Narváez departed Spain with 600 men to colonise the Gulf Coast of Florida. By 1536, four of them had made it back. The rest died in swamps, hurricanes, arrow attacks, and on a barrier island in Texas that the survivors named the Island of Misfortune.

Scientific illustration of grape phylloxera (Daktulosphaira vitifoliae)

The Louse That Drank Europe Dry

May 17, 2026 By Andy Barca

Almost every vineyard in Europe today dates from after the 1860s. The reason is a tiny American insect called phylloxera, which arrived with well-meaning botanists and proceeded to kill nearly every grapevine on the continent. There is still no cure.

Portrait of Marie Antoinette, 1775

The Marriage That Wasn't

May 16, 2026 By Andy Barca

On 16 May 1770, Marie Antoinette and Louis-Auguste married at Versailles. She was 14, he was 15, and they would fail to consummate the marriage for the next seven years. The consequences were not nothing.

Portrait of Henry VIII of England after Hans Holbein the Younger

Half His Subjects

May 15, 2026 By Andy Barca

On 15 May 1532, the Convocation of Canterbury surrendered the Church of England's right to make its own laws without royal approval. Thomas More resigned the next day. The monasteries followed four years later. Henry VIII had decided he wanted the other half.