Trier: Bridge

Trier rose to prominence when the Roman general Agrippa built the road from Lyon to Cologne, and a bridge had to be constructed near the place where the Saar empties itself in the Moselle. There is a dendrochonological date of 17 BCE for one of the pieces of wood of the bridge. The monument was rebuilt several rchronological dates 71, 144, and 

It is still in use, as this satellite photo shows. A couple of things have changed, however. Today, the bridge has six arches, but we know that there must have been at least one arch more in the west, and three in the east, bringing the grand total up to ten. The superstructure, now made of stone, was once made of wood. The second photo shows, immediately below the modern arch of brick, a ledge; a similar row of these stones can be seen on the photo to the left. This was the support of the wooden arch.