In Northern Europe, a distinctive kind of monumental stone architecture made its appearance late in the Neolithic period, known as:.

Megalith architecture

Explanation:

The history specialists of the 18t centuries believed that the occupying armies of the Roman empire, Goths, or Mongols had constructed them.

A megalith is a massive stone utilized, alone or amongst other rocks, to build a framework or shrine. In the Neolithic era, these buildings were mostly constructed. The Bronze Age started to be developed into them.

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explanation:

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