Zwammerdam: Roman Fort, Ships and Local History

Zwammerdam has several distinct facets: the Roman fort of Nigrum Pullum, archaeological river ships, churches and a monument. The town’s history therefore spans Roman presence along the Limes to memorial sites and preserved architectural forms. Which of these topics interests you most can shape how you see the town.

Roman fort and settlement

Nigrum Pullum was a Roman fort on the Roman Limes in Zuid-Holland. Around 300 Roman soldiers lived there. Several hundred civilians probably lived in the adjacent vicus, including women, children, craftspeople and merchants. These two figures give an impression of the different groups associated with the fort and its surroundings: soldiers inside the fort and civilian residents in the neighbouring settlement.

At around 1.2 hectares, Nigrum Pullum was the smallest known fort on the Lower Germanic Limes. Its approximate area gives a concrete sense of the fort’s size; at the same time, its designation as the smallest known fort makes it a notable feature of the region’s Roman history. The visible remains on the grounds of the Ipse de Bruggen care facility are also part of the archaeological picture: the foundations of the stone rear gate, part of the wall and sections of the associated headquarters, the principia, have been made visible in the landscape.

Roman ships and their discovery

Six Roman ships were discovered during excavations in Zwammerdam in the 1970s: three canoes and three flat-bottomed vessels. Their unusually complete condition was remarkable for ships of this type. The discovery story begins on a precisely dated day: in December 1971, old timber came to light during work on an underground transport system at the Hooge Burgh site. It proved to be a Roman dugout canoe; shortly afterwards, five more Roman river ships were found. The eventual total of six ships and this first find therefore describe the full discovery and how it began.

Routes through the landscape

Stage 05 of the Romeinse Limespad is a marked route. Rivers, canals and farmland shape its landscape. It runs from Zwammerdam to the place where the Roman fort of Nigrum Pullum, a settlement, quays and ships were discovered. The description thus links a route through an area shaped by waterways and agriculture with a destination rooted in the town’s Roman history.

Another route is called “Wandelen door Nigrvm Pvllvm & Zwammerdam”. It starts at the De Haven visitor centre, where Roman objects are on display, and ends at a modern Limes landing stage that recalls the site’s former Roman harbour activity. The objects shown at De Haven may change. For route planning, it is also useful to distinguish between modes of transport: the route mentioned is a walking route, while “Leve de Romeinen” is a 33-kilometre cycling route that leads from milestone to milestone. Zwammerdam is listed as a reference point on this cycling route. Check the route files before setting off.

Churches and memorial sites

The Remonstrantse Schuilkerk is the oldest Remonstrant church building still used as such for regional services held quarterly. The history of the original Remonstrant church includes a turbulent sequence of dates: it was built in 1636, destroyed by French troops in 1672 and returned to use after restoration in 1676.

The Dutch Reformed Church also offers a distinctive architectural landmark. It is a single-aisled, Late Gothic cruciform church with a five-sided closed choir and wooden barrel vaults with tie beams. These features describe both the form of the church building and the design of its interior.

The resistance monument commemorates four local resistance fighters who were shot by the occupying forces during the Second World War. Two grave slabs at the monument commemorate nine Dutch military personnel. The memorial site thus honours the four local resistance fighters as well as the military personnel.

The historic town centre

The historic town centre is characterised by a compact grouping of buildings, short sightlines along its winding street pattern and narrow street profiles. Rather than long views, the curves of the streets and the close arrangement of the buildings shape the sense of space. The town’s layout therefore adds another perspective to its archaeological history: Zwammerdam’s architectural character, shaped over time.

Discover more destinations: Alphen Aan Den Rijn, Aarlanderveen.

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