The fall of Antwerp on October 17, 1585, marked the climax of Alessandro Farnese's brilliant siege, in which Spanish engineers built a fortified bridge across the Scheldt to strangle the rebel city's supply lines. The Dutch Revolt's northern provinces would endure, but Antwerp's Protestant merchants fled north, and Amsterdam inherited the wealth and trade networks that had made Antwerp the richest port in Europe.
For fourteen months, Alessandro Farnese, Duke of Parma, had strangled Antwerp with one of the most audacious engineering feats of the sixteenth century: a nearly 800-meter bridge of boats across the Scheldt River, built to cut the city off from relief by sea. Dutch engineers tried to break it with a primitive fireship-bomb, an early ancestor of the naval mine, but Parma's men held the line.
When the city finally capitulated on October 17, 1585, the terms were generous by the era's brutal standards — Calvinists were given four years to convert or leave — but the psychological and economic damage was permanent. Antwerp's Protestant merchant class, along with much of its skilled labor and capital, streamed north into Holland and Zeeland.
That exodus supercharged Amsterdam's rise. Within a generation, the city that inherited Antwerp's refugees and trading contacts became the hub of the Dutch Golden Age, while Antwerp, cut off from the sea by a Dutch blockade of the Scheldt that would last over two centuries, slid into prolonged decline.
Key people: Alessandro Farnese, Duke of Parma