Eynhallow Church is probably the ruin of a 12th-century Benedicitne monastery. Because of the name of the isle it is likely that Eynhallow was an important religious centre. Eyin-Helha is Old Norse for Holy Isle.
Eynhallow Church was deserted before the reformation (circa 1560). The church was converted into dwellings in the 16th century. In 1851 the inhabitants of Eynhallow were transferred elsewhere and the church and other buildings were stripped of their roofs. The ruin was consolidated by W.R. Lethaby in 1897.
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The Gravensteen is a castle in Ghent originating from the Middle Ages. The name means 'castle of the counts' in Dutch. Arnulf I (918–965), Count of Flanders, was the first to fortify this place, building a medieval bastion on this high sand dune, naturally protected by the river Leie and its marshy banks. This bastion consisted of a central wooden building and several surrounding buildings, also in wood.
In the early 11th century, the wooden building was replaced by a stone residence, consisting of three large halls that made up three storeys, connected by a stone stairwell. The monumental stone staircase, the light openings, the fireplaces built into the walls and the latrines were signs of considerable luxury and comfort in those days. There was probably also a tower.