Koepelkerk is an octagonal neoclassical church on Jansplein, built in the 1830s and still used by the Reformed Church. Its domed form stands out in central Arnhem, especially among the shops and cafes around the square.
It is a quick architectural stop rather than a major church visit, but it fits well into a walk between Korenmarkt, the historic cellars, and St Eusebius' Church.