Please, look on the only photo of the interior of the church [Saint Nicholas] in Brno, Czech Republic:
The Church was situated on the Namesti Svobody Square and serve to the nation called “Wallons”. Saint Nicholas church has had square-shaped nave and compacted presbyterium – its detail you can observate on the photo above. There were four stained glass windows in the presbyterium and the wall was made up of sedilia and sanctuarium. Unfortunately the photo doesn’t show us the appearance of the main altar, pulpit and also wall paintings. The triumph arch is having a baroque look on the photo, although in the medieval time it has had to be ogive. There was no a space for sacristy, so the priest and his ministrants should have got dress into liturgical clothes directly in the church.