Pfalzgrafenstein Castle

Pfalzgrafenstein Castle is the one castle on the Upper Middle Rhine that never had to surrender, because it was never built to be lived in. It stands on the rock island of Falkenau in the middle of the river at Kaub — 110 meters from the right bank, 160 from the left — a five-sided tower wrapped in a ship-shaped wall whose pointed prow still faces upstream into the ice. The French writer Victor Hugo saw a vessel eternally at anchor; the Europäisches Burgeninstitut sees the same thing for a structural reason, describing the whole island as working like a well-fortified ship in the water.

It was a Zollburg — a toll castle — and that single fact explains everything about it: why a pope wanted it pulled down, why it was never a residence, and why, with the Marksburg and the Alte Burg at Boppard, it is one of the very few Rhine castles that war, ice, and flood never managed to destroy. Read against the robber-knight castles upstream that the crown leveled, Pfalzgrafenstein is the late-medieval Rhine toll system at its most successful: a contested levy backed by enough territorial power to outlast every authority that questioned it.

Quick Facts

A toll the pope tried to abolish (1277–1327)

The story begins not with a castle but with a purchase. In 1277 the Rhenish Pfalzgraf Ludwig II of the House of Wittelsbach bought the town of Kaub, the hill castle of Gutenfels above it, and, most valuably, the right to levy a Rhine toll, from Philipp von Falkenstein, an imperial chamberlain of the Bolanden-Falkenstein line; further instruments completed the transfer over the next decade. His descendant Ludwig IV, “the Bavarian,” reactivated the toll around 1320 and kept its revenue for himself.

In 1324 Pope John XXII at Avignon excommunicated Ludwig — over his contested election as German king against Frederick the Fair, not over the toll. But the toll provoked an ecclesiastical reckoning of its own. In 1326–1327, in what the regional record calls a sudden move, Ludwig had a five-sided tower raised on the Falkenau rock to enforce the levy, and in 1327 the pope wrote to Count Robert von Virneburg and urged the archbishops of Mainz, Trier, and Cologne to remove the toll and destroy the “turris fortissima.” They never did. The tower not only survived — it was enlarged.

The stone ship takes shape (1338–1607)

The lone tower became a fortress in stages, each one a response to the river as much as to any enemy. Between 1338 and 1342 a ring wall went up around it: roughly 12 meters high, up to 2.6 meters thick, with a covered wall-walk, enclosing a long hexagon about 51 by 21 meters that takes up almost the whole island. Its southern point, like the keep’s, was set against the current, so that drifting winter ice struck a wedge rather than a flat face. A perpetual Burgfrieden of 1339 gives the first written naming of “Burg Pfalzgrafenstein” and passed it to the Heidelberg branch of the Wittelsbach house.

The decisive change came in 1606–1607. Elector Frederick IV of the Palatinate, whose family by then held the castle, reinforced the ice-battered upstream point with massive ashlar masonry, clamped it with iron, and set a gun platform on top. From that moment the silhouette read as a ship sailing against the stream — the image visitors photograph today. The ring wall received loopholes for hand firearms and an inner gallery on arcades; Pfalzgrafenstein was among the first Middle Rhine castles rebuilt for gunpowder rather than crossbows. In 1658 projecting slate-clad lookout oriels were added to flank the walls, and they survive here as an unusually complete example of the type.

Sieges that failed (1504–1756)

For a building whose only job was to make ships stop and pay, Pfalzgrafenstein attracted a remarkable amount of military attention — and shrugged all of it off. In 1504, during the War of the Succession of Landshut, the castle held out with Kaub and Gutenfels through a 39-day siege by Landgrave William II of Hesse and emerged unscathed; the Hessians withdrew after heavy losses. In 1620, during the Thirty Years’ War, Spanish forces occupied it for roughly a decade — but it was taken without a fight, the garrison allowed to leave freely after a brief exchange of fire at Kaub on the bank.

The castle’s defenses were never really tested by storm because its position did the work: rocky reefs and the rapid known since the 15th century as the Wildes Gefähr made the wider left channel impassable, funneling all river traffic through the narrow gap between the island and the fortified town. Siege engines could not get at it. The last additions were emphatic rather than defensive: in 1714 the keep received its octagonal Baroque cap with an open lantern, and after a fire the present cap was rebuilt in 1756, attributed to the Palatine court architect Franz Wilhelm Rabaliatti. It is this silhouette that completes the “stone ship” today.

Blücher crosses the Rhine (1803–1867)

In 1803, in the Napoleonic reshuffling of the German map, the castle passed to the Duchy of Nassau. A decade later it had its single most consequential moment — not as a fortress, but as a foothold. On the night of the New Year 1813/1814, during the Wars of Liberation, the Prussian field marshal Gebhard Leberecht von Blücher crossed the Rhine at Kaub with the Army of Silesia. Russian engineers anchored a pontoon bridge in two segments on the island itself — seventy-one canvas pontoons in all — while Kaub river pilots ferried the vanguard across in skiffs. Some fifty to sixty thousand troops, around fifteen thousand horses, and 182 guns crossed over several days in pursuit of Napoleon after Leipzig. Blücher’s headquarters was a Kaub tavern that has housed the Blüchermuseum since 1913.

The toll itself outlived the empire that had once disputed it. Only in 1866, after the Austro-Prussian War made both banks Prussian, did control pass to Prussia; the last toll officials left the island in 1867, ending more than five centuries of levy. Pfalzgrafenstein then served quietly as a navigation signal station for Rhine shipping into the 1960s before passing to the state of Rhineland-Palatinate as a monument.

Why it survived: power, not permission

Pfalzgrafenstein is most revealing when set beside the castles it does not resemble. A short way upstream, Reichenstein and Sooneck were stormed and slighted by King Rudolf I of Habsburg in 1282 and forbidden to rebuild — punished as the seats of Raubritter, knights running tolls no authority had granted them. Pfalzgrafenstein levied a toll a pope and three archbishops actively wanted destroyed, and it was never touched. The difference was not a cleaner piece of paper. In 1326 Ludwig’s own title was contested — a doubly elected, excommunicated king — and in strict law the new toll was no better sanctioned than theirs.

What Pfalzgrafenstein had instead was power. The Wittelsbach Pfalzgrafen had spent fifty years assembling a closed grip on this stretch of river — the toll rights bought from the Falkensteins, the hill castle of Gutenfels, the walled town of Kaub, and the Pfalz itself, together a barrier no vessel could run without paying. Ludwig acted at once as the Pfalzgraf who owned the toll and as the king who could colorably license it, and in 1339 he passed the castle to the Heidelberg branch of his house — the line that in 1356 received the exclusive Palatine electorship. The Golden Bull of that year confirmed the electors’ right to their Rhine tolls, and what force had held since 1326 finally became settled law. This is exactly the long arc traced in the Rhine as contested territory: a toll castle survived not because its levy was clean but because a territorial prince — not a freelance knight — stood behind it long enough for the law to catch up. Pfalzgrafenstein is the clearest surviving case of that prince winning.

Visiting in 2026

Pfalzgrafenstein can only be reached by the small passenger ferry from Kaub, and only when the Rhine cooperates — the ferry cannot dock when the river runs high, roughly above four meters on the Kaub gauge. Kaub has a station on the Koblenz–Wiesbaden right-bank line, a few minutes’ walk from the wharf, but that line is closed for full reconstruction from 10 July to 11 December 2026 with replacement buses only, so check Deutsche Bahn before relying on the train. There are no toilets and no services on the island by design; public, barrier-free toilets are at the Pegelhaus car park in Kaub. As a historic island site it is, regrettably, not wheelchair accessible. Allow about an hour for the castle and ferry together, and pair it with the Blüchermuseum in Kaub.

For 2026 the castle opens on weekends and public holidays from 1 February to 14 March (10:00–16:00); Thursday to Sunday and public holidays from 15 March to 31 October (10:00–17:00); and weekends and public holidays through November (10:00–16:00). It is closed in December and January. Admission, which includes the passenger ferry, as published by the operator:

Beyond Pfalzgrafenstein

Pfalzgrafenstein is one stop on the densest castle stretch in Europe, and it reads best in company. For the full corridor, see the guide to the castles of the Rhine Gorge. The most instructive neighbors are the ones that frame its argument: the Marksburg at Braubach, the other never-taken Rhine castle and a legitimate comital toll; Reichenstein and Sooneck, the slighted robber-knight seats that show what happened when no prince stood behind the levy; and Rheinstein and Stolzenfels, the archbishops’ Rhine strongholds — the church’s answer to exactly the toll Pfalzgrafenstein collected. Downstream, the vast bastioned ruin of Rheinfels shows the opposite fate: a Rhine fortress that power could not save.

Conclusion

Pfalzgrafenstein is, in the end, a building that was never meant to be loved and has become one of the most photographed objects on the river anyway. It was a tollbooth with iron-clamped walls, built by an excommunicated king in defiance of pope and archbishops and never lived in, and it survived seven centuries of war, ice, and politics for the same reason it was built: a prince with the power to enforce a contested toll stood behind it long enough for the law to catch up. The pope wanted it gone in 1327; it is still there, still shaped like a ship, still pointing its prow at a current that no longer threatens it. Few monuments on the Rhine state their own meaning so plainly.

Principal Sources

Backes, Magnus. Burg Pfalzgrafenstein und der Rheinzoll. Schnell & Steiner, 2003 (Führungshefte der Edition Burgen, Schlösser, Altertümer Rheinland-Pfalz, Heft 11).

Dehio-Handbuch der deutschen Kunstdenkmäler: Rheinland-Pfalz, Saarland. 2nd ed. Deutscher Kunstverlag, 1984.

Frank, Lorenz. “Die Baugeschichte des Pfalzgrafenstein bei Kaub am Rhein.” Burgen und Schlösser 47, no. 3 (2006): 143–153.

Friedrich, Reinhard. “Pfalzgrafenstein.” EBIDAT — Burgendatenbank des Europäischen Burgeninstituts (Deutsche Burgenvereinigung).

Sebald, Eduard. “Der Pfalzgrafenstein und die Kauber Zollstelle im Kontext der Zoll- und Territorialpolitik der Pfalzgrafen bei Rhein.” Burgen und Schlösser 47, no. 3 (2006): 123–135.

Visitor information, opening hours, and 2026 admission are drawn from the operator, Generaldirektion Kulturelles Erbe Rheinland-Pfalz (Burgen, Schlösser, Altertümer), tor-zum-welterbe.de, retrieved 16 May 2026.

Image credits. Featured image: Kora27, CC BY-SA 4.0, via Wikimedia Commons. In-article images, in order: Jörg Braukmann, CC BY-SA 4.0; Tilman2007, CC BY-SA 4.0; Joseph Knippenberg, Rheinisches Bildarchiv (rba_225546_kni), CC BY-SA 3.0; Willem van de Poll, Nationaal Archief, CC0 — all via Wikimedia Commons.