Is this the WORLD'S OLDEST 'POLYGONAL' MEGALITHIC WALL? MALTA Ġgantija

The oldest polygonal megalithic wall in the world seems to be in Malta on the Island of Gozo. This is of course rather interesting! It would suggest that similar words like Giza and Gaza are also the holy locations of Polygonal walls. How about places like, for example, King Solomon's Mines or even the megalithic walls at the Giza Pyramids?