Civil Defense Architecture
Star forts, or bastion forts, are 15th- to 19th-century, low-profile, star-shaped fortifications designed with angular bastions to counter cannon fire. Emerging in Italy, they feature thick, earth-filled walls and interlocking fields of fire, allowing defenders to eliminate blind spots and withstand artillery.
So David took up residence in the fortress and called it the City of David. He built it up all the way around, from the supporting terraces inward.
