Perhaps the oldest bridge in Europe that is still in use today can be found in Greece; named the Arkadiko Bridge, it dates back to Mycenaean times.

The Arkadiko Bridge, also named the Kazarma Bridge, is a Mycenaean construction which can be found in the southern region of mainland Greece, the Peloponnesian peninsula.

The bridge, which is located near the modern road from Tiryns to Epidauros in the Peloponnese, is still used very frequently today. The small arched bridge is still traversed by cars, although it is officially only endorsed for pedestrian use, and it is an important landmark and functional feature of the entire area.

The bridge dates back to Greece’s Bronze Age, or around 1,300 BC. Originally, it was built to connect the ancient city of Epidauros with Mycenae, and was therefore part of a military road network.

However, what is perhaps the most interesting feature of the bridge is the way it was constructed. The bridge has remained standing and stable for thousands of years, but incredibly does not use any form of binder such as mortar. Not only the weight of the limestone, but also how symmetrically the blocks are placed on the vertical axis, makes the bridge stable.

This style of construction, which is called Cyclopean masonry, uses massive limestone boulders, roughly fitted together with very little space left between adjacent stones, and no mortar. The boulders typically seem unworked, but some may have been shaped roughly with a hammer and the gaps between boulders filled in with smaller chunks of limestone.

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