The military engineer Guillin in the service of King Louis XIV left a description of a large part of Alsace from a military point of view.
His interest was focused on all buildings that may have a use for war or defence (towers, castles, walls and ramparts).
Here is his description of Alteckendorf:
Oberaldorff is a place in the bottom in which there is a small chapel.

Eckendorff is located near the bottom of a small creek with a church that has a non-arched belfry.
The cemetery is covered in undergrowth.
It is said that there is a good castle on the edge of the creek that forms a square face with sides of width 20 Toises flanked by three towers with battlements.
The walls are 15 feet high on the ground floor and 2 to 3 feet thick in good condition surrounded by a large ditch full of water 30 to 40 feet across and 6 feet deep while the inside of the castle has been burned..
According to the statements of Guillin, it is clear that the Eckendorf Castle, today gone, was a military building of the Wasserburg type.
The body of the castle was a square of 39 metres.
Its walls had a thickness of 65 to 95 cm and a height of about 5 metres.
There was a gap in the defences probably filled with water from the Landgraben stream.
This gap was 10 to 13 metres wide with a depth of 2 metres.
The military engineer Guillin in the service of King Louis XIV left a description of a large part of Alsace from a military point of view. His interest was focused on all buildings that may have a use for war or defence (towers, castles, walls and ramparts). Here is his description of Alteckendorf:
Oberaldorff is a place in the bottom in which there is a small chapel.
Eckendorff is located near the bottom of a small creek with a church that has a non-arched belfry. The cemetery is covered in undergrowth. It is said that there is a good castle on the edge of the creek that forms a square face with sides of width 20 Toises flanked by three towers with battlements. The walls are 15 feet high on the ground floor and 2 to 3 feet thick in good condition surrounded by a large ditch full of water 30 to 40 feet across and 6 feet deep while the inside of the castle has been burned..
According to the statements of Guillin, it is clear that the Eckendorf Castle, today gone, was a military building of the Wasserburg type. The body of the castle was a square of 39 metres. Its walls had a thickness of 65 to 95 cm and a height of about 5 metres. There was a gap in the defences probably filled with water from the Landgraben stream. This gap was 10 to 13 metres wide with a depth of 2 metres.
Alteckendorf