Before the dikes, the Wadden Sea flooded this part of Groningen several times a year. The people who chose to live here did so by stacking earth into mounds called wierden - small artificial hills tall enough to keep a village above the worst of the water. Warfhuizen sits on two of them. The smaller mound was originally raised for a separate village called Burum that has long since merged into its neighbor. The larger mound carries the church. The current building dates only to 1858 - a tidy neoclassical replacement for the thirteenth-century original - but the bell in the tower is medieval. It rang across these flooded marshes when the rest of the church was different stones, and it still rings today.

The statue at the heart of the shrine is not Dutch. It was carved in Seville by Miguel Bejarano Moreno, one of the city's renowned procession sculptors - the artisans whose Virgins are carried through the streets during Holy Week in clouds of incense and candle smoke. Bejarano Moreno's Sorrowful Mother of Warfhuizen has the inward grief of Andalusian baroque, all glassy tears and hand-stitched velvet, plunked down in a Groningen polder village where the dominant religious tradition has been Dutch Reformed for four centuries. Spanish Catholics living in the Netherlands began making informal pilgrimages here to see a Mary who looked like home. Word spread. Other Catholics in the region started coming, then Catholics from farther afield, until the shrine quietly became what it is now: the highest-latitude Marian sanctuary on the European mainland.

The full title of the church is Our Lady of the Enclosed Garden - hortus conclusus, an old Marian image taken from the Song of Songs. The garden is enclosed; the bride is sealed. In the Netherlands, hermitages with an actual resident hermit are vanishingly rare. Most of the country's monastic life ended at the Reformation, and what survived tends to be communal. Warfhuizen is one of the few exceptions. The hermit lives next door to the church, tends the shrine, swaps the handkerchiefs, and keeps the kind of contemplative routine that has been going out of fashion in Western Europe for several centuries running. A village of fewer than two hundred people, on a mound built to escape the sea, hosts one of the last working hermits in the country.

The geography of Catholic devotion in Europe runs heavily Mediterranean. The great Marian shrines - Lourdes, Fatima, Guadalupe of Extremadura, Czestochowa, Loreto - cluster south and west, with a thin Polish and Bavarian outlier to the east. Warfhuizen, at just over 53 degrees north, sits well above all of them. Beyond it, on the continental mainland, there is only Lutheran Scandinavia. The 1910 pipe organ in the church was itself a kind of immigrant - reconstructed from parts of two earlier instruments dating to the seventeenth and eighteenth centuries, salvaged and reassembled. Warfhuizen is full of these recompositions: a medieval bell in a nineteenth-century church on a mound raised against a sea now held back by dikes, hosting an Andalusian Virgin tended by a Dutch hermit. It works because all of it, somehow, kept going.