As often, we are indebted to Wikipedia for this explanation of kullas:  “A distinctive type of Ottoman tower houses meaning “mountain” or “top” via Turkish kule, developed and were built in the Balkans, as well as in Romania, after the Ottoman conquest in the Middle Ages by both Christian and Muslim communities. The practice began during the decline of Ottoman power in the 17th century and flourished until the early 20th century. The tower houses were typically made out of stone, rose three or four storeys, and were square or rectangular in shape. They served both military (defence, watchtower) and civilian (residential) purposes in order to protect the extended family.”  When Wikipedia is good, it’s very good.  The bilingual captions on this unused card explain each one of those you see.  Grade: 1