This is the wharf crane in Gdańsk. It is located at the Brama Szeroka ( Wide Gate ) on the Motlava river. It is the oldest harbour crane in the Europe and was built in 1442-1444. Although the first mention is from 1367. It was used for shipping of berrels of beer and other goods, dead weights and setting of ship masts. The wooden part of the crane was burnt by the Red Army in 1945. And then it was restored.
Pity this is such a small picture of such an interesting subject. A pair of Tugs manouver a breakwater caisson for a Mulberry harbour. Note the Bofors ready for action these caissons could only be towed at 4 knots so were a big fat target for any LW bomber.
Nice. "Big fat target" reminds me of a story I read where, just before D-Day, a soldier asked a sailor what LST stood for and the sailor replied, "Long Slow Target".