For the Roman festival of this weekend in Nijmegen, we (I'm part of the all volunteer organization) are building a 10 meter stretch of Roman wall and ditch. Sadly, it'll be only temporary, because of the complicated permits and regulations. Nevertheless, we'll do it right and make it as archaeologically and historically accurate as possible, materials excepted (oak would be prohibitively expensive for a temporary project). The wall will in fact be built right on the lines of the original wall of the early imperial second fort at the Nijmegen Kops Plateau(Youtube video of the digs in Dutch).

Below are some impressions of the first day.

A Nijmegen city archaeologist came equipped with a GPS system to indicate the outlines of the wall that we'd selected.

Jurjen Draaisma(right) and I then laid out the new post holes. As we are following the dig reports, these were not evenly spaced.

20 Posts (650*15*20cm) and 15 connecting bars (500*10*10) that need to be cut to size and get a mortise and tenon sawn into them.

Stress relief?