Maastricht was Mosae Trajectum long before it was Dutch, and it has been fought over ever since: Roman river crossing, Merovingian bishop's seat, twenty-one sieges, kilometres of quarry tunnels. Three days read those layers from the bottom up.
Consecrated around the year 1000 on the site of a Roman temple, this holds the oldest surviving church interior in the Netherlands. The fortress-like Westwerk is untouched 11th-century masonry; the treasury keeps Merovingian reliquaries. Treasury €5.
Under the hotel lobby on Plankstraat, an excavation left exactly where it was found: a 2nd-century Roman well, cobbles of a square, and part of the 4th-century castellum wall — physical proof the city began as Mosae Trajectum.
Built in 1229, the Helpoort is the oldest surviving city gate in the country, with a small fortification collection in its towers. From it the Onze Lieve Vrouwewal runs above the Jeker to the Pater Vincktoren watchtower.
The 17th- and 18th-century merchant quarter, built along Roman street alignments: gable stones, Baroque doorcases, Namur limestone. Condemned as a slum in 1930 and nearly flattened, its 1960s rescue was the first big urban restoration in the Netherlands.
A pentagonal marl fort of 1701–02, thrown up to deny the French the Sint-Pietersberg heights after the sieges of 1673 and 1676. Guided tours only, through casemates, powder rooms and gun galleries cut into soft yellow stone.
The Linie van Du Moulin of 1772–77 survives here as bastions, ravelins and countermine tunnels, scarred by the French bombardment of 1794. Now an overgrown free-access reserve where wall lizards sun themselves on the ramparts.
The only American WWII cemetery in the Netherlands: 8,288 graves and 1,722 names on the Walls of the Missing. Since 1945 every single grave has been adopted by a local family, a tradition now eighty years unbroken.
Pieter Post's town hall of 1659–64 stands free on all sides in the middle of the Markt, with twin staircases so the rival overlords of Brabant and Liège could enter without meeting — Maastricht was ruled by both until 1794.
Some 20,000 passages were cut into the Sint-Pietersberg by marl quarrymen from the 1400s onward. Guided tours pass charcoal drawings, wartime shelters and the sealed chamber where Rembrandt's Night Watch was hidden in 1942.
The Jeker still turns a mill wheel documented since 1290. The quarter holds the 1655 Pesthuys plague hospital, a law faculty in a 14th-century monastery, and stretches of the second medieval city wall behind the gardens.
Set in the 16th-century residence used by the prince-bishops of Liège, where Charles V is said to have lodged. Period rooms, Maastricht silver, Limburg glass and clocks, shown as a lived-in house rather than a gallery.
The Crosier friars raised this church and cloister from 1438. After the French suppression of 1794 it served as arsenal, agricultural research station and warehouse, until a 2005 conversion turned the Gothic nave into a hotel lounge.