Saint Margaret Church is a local Sopron church rather than one of the city's headline monuments, but it can reward visitors who enjoy following religious architecture beyond the main square. Its dedication to Saint Margaret of the Arpad dynasty gives it a specifically Hungarian devotional frame.
Treat it as a short stop while exploring residential Sopron. It is most worthwhile if you are already nearby or have an interest in churches, saints, and the quieter edges of the old city.