Holland historical timeline

Dutch history is unusually easy to read in the landscape, because so much of it is about the same problem. A delta is fertile and defensible and floods; everything that follows -- the drainage boards, the dikes, the polders, the wealth that came from shipping out of a river mouth -- is a response to that. The institutions built to manage water came first, and the state was assembled around them centuries later.

Chronology

1. c. 1122 A collaborative body forms to build and maintain a dam in the Rhine: the first of the water boards. They are among the oldest democratic institutions in the country, twenty-one still exist, and their members are still elected -- so the management of water has its own ballot, separate from national politics.
2. 1568 The provinces revolt against Philip II of Spain. The eighty years of war that follow turn separately governed territories into something with a common interest, and the fortified towns and flooded defence lines built during it are still legible in the map.
3. 1579 The northern provinces sign the Union of Utrecht; in 1581 the Act of Abjuration declares them independent of Philip. The Union's arrangement -- provincial autonomy inside a federal whole -- is the ancestor of a political culture still built on negotiated consent.
4. 1602 The States General amalgamates the existing trading companies into the Dutch East India Company on 20 March. The wealth that follows pays for the canal rings and merchant houses of the western cities, and funds a colonial and slave-trading system run from those same buildings.
5. 1648 The Peace of Westphalia has Spain recognise the Republic. The southern border it settles is close to the one between the Netherlands and Belgium today.
6. 1795 French armies arrive and the Republic ends in the Batavian Revolution. After Napoleon, the country is remade as a kingdom in 1815 -- and the long poverty between the two is why so much seventeenth-century building survived instead of being replaced.
7. 1830 Belgium leaves the kingdom, fixing the modern southern border and leaving the Scheldt estuary divided between two countries -- an arrangement that still shapes how Antwerp and Rotterdam relate.
8. 1932 The Afsluitdijk closes the Zuiderzee, turning a sea inlet into a freshwater lake. It ends Amsterdam's life as a sea port, makes the later reclamation of Flevoland possible, and is still the road north.
9. 1953 A North Sea storm surge breaks the south-western defences and kills 1,836 people. The Delta Works built in response close the Zeeland estuaries and are the most conspicuous engineering in the country.
10. 1968 The reclamation that creates Flevoland is completed. It is the last large piece of the country to be made rather than found, and the policy argument since has been about what reclaimed land is for -- the Oostvaardersplassen, drained for industry, became a nature reserve instead.

What survived, and how

Almost nothing in the Dutch landscape is old in the sense of being untouched, and almost all of it is old in the sense of being continuously maintained. Dikes have been raised repeatedly, the windmills that drained the polders gave way to steam and then electric pumps, and the drained ground goes on subsiding, so the work never finishes.

The twentieth century did the visible damage. Occupation and bombing removed large parts of several city centres -- Rotterdam most completely -- and what stands there now is deliberate postwar architecture rather than restoration. That is why Dutch cities differ so sharply in age from one another: Amsterdam's centre survived because there was no money to replace it, and Rotterdam's did not survive at all.