Architecture of the Byzantine world

For a number of reasons, the Yuryevets Fortress was a rather unique fortification of the XVII century Russian Tsardom - firstly, it featured stone fortifications that were rather large for a provincial town; and secondly, it was a unique example of the transition from typical stone fortresses - albeit adapted for the use of artillery - to the bastion system. The fortress’s towers and walls have not survived to the present day - they were lost in the XIX century - but the bastions have been preserved, and by superimposing a LiDAR scan onto a satellite image, it is possible to see them (and, to the north, the foundations of the walls) through the overgrown forest.