Trenctn, Slovakia

1. Gate Tower;
2. Residential Area;
3. Gate Tower;
4. Fortified Church;
5. Lower Castle;
6. Administrative and Residential Buildings;
7. Chapel;
8. Moat;
9. Upper Castle;
10. Courtyard;
11. Keep;
12. Great Hall;
13. Lists.

Roman Empire, AD 395

The division of the Roman Empire into the West and East Empires at the death of Theodosius I in 

AD 395

Croyland Bridge (from the Topographia Britannica(

Antibes Aqueduct

Pont Ambroix, Gard Depi, France

Carcassone, France

The "hoardings" projecting from the wall of the castle created  an overhanging gallery.  The floors of these "hoardings" had openings from which the defenders could protect the walls from enemy assault.

Uex'kull - Inskile - Latvia

12th century harbor castle.  Founders -- Order of the Tuetonic Knights.

First stone castle in Latvia.