The first thing that strikes the eye at the church of Rogny is, of course, the colossal keep, dated 1643, which is not one of the most famous in the Thiérache, but whose dimensions are on a par with the most imposing, such as Prisces or Saint-Algis. It is also built entirely of red brick, and its front has decorations in glazed brick.

Unusually, there is a sundial on one of the corners of the keep; we have not noticed a similar one on other fortified churches in the region.

At the base, its walls measure more than two metres thick. Only the three metres of the keep of Saint-Nicolas de Signy-le-Petit in the Ardennes surpass it.

As in the fortified churches of Englancourt, Esquéhéries or Lavaqueresse, it is located above the choir; the altar is therefore in the lower part of the keep, lit by two large side windows.

On the walls of the nave, one can still see traces of Romanesque arches in a mixture of stone and brick – clear evidence that the church has frequently given rise to repairs over the centuries.

The round tower attached to the church leads to an escape room on the first floor of the keep – at a height of over eight metres! A second floor of this keep was unfortunately destroyed.

The beautiful, if already somewhat dilapidated, portal of the nave probably dates from the 15th century and is in the flamboyant style. This is the entrance to the nave. Normally the door should probably be locked, but it has obviously warped so much that you can still open it without any problems. At least this was the case during our visit.

So we could also admire the simple but very worth seeing baptismal font from the 12th or 13th century. And, of course, we had a look from below into the keep, which once again made the impressive dimensions clear.