The archaeological excavations carried out this year at the site of La Bastida (Totana, Murcia, in Spain) have shed light on an imposing fortification system, unique for its time. The discovery, together with all other discoveries made in recent years, reaffirm that the city was the most advanced settlement in Europe in political and military terms during the Bronze Age (ca. 4,200 years ago), and is comparable only to the Minoan civilisation of Crete.
Similar characteristics have not been observed in other constructions of the Bronze Age, with three-metre thick walls, square towers originally measuring up to seven metres, a monumental entrance and an ogival arched postern gate; a fully conserved architectural element unique in Europe in that period.
That’s early for continental Europe. They’re arguing that it was directly or indirectly derived from SW Asia or perhaps Minoan, but it’s hard to tell how accurate that might be. You’d probably have to rule out ‘parallel evolution’ if you want to call it that: similar structure because of similar functional constraints. Still. . . .2200 BC!