Pannonia Gallery is a small Sopron art stop, useful when you want a break from churches, walls, and wine cellars. Its interest is regional rather than blockbuster, with painting and visual culture that help place Sopron within western Hungary's broader artistic life.
Treat it as a short indoor visit while exploring the old town. It is especially worthwhile if the weather turns or if you are building a slower cultural day around Fő Tér, the Firewatch Tower, and the city's Roman and medieval layers.