Final answer:
A stone-built subterranean tomb of the Mycenaean civilization consisting of a circular chamber covered by a corbeled dome and entered by a walled passage through a hillside is called a tholos. These tombs, such as the Treasury of Atreus in Mycenae, are examples of corbelled vaulting and were used for burial purposes.
Step-by-step explanation:
The stone-built subterranean tomb of the Mycenaean civilization, consisting of a circular chamber covered by a corbeled dome and entered by a walled passage through a hillside, is called a tholos. These tombs, such as the Treasury of Atreus in Mycenae, are examples of corbelled vaulting, where stones are stacked to form an arch-like structure. They are accessed through a narrow passageway known as a dromos. The tholos tombs were used for burial purposes and are a significant architectural feature of the Mycenaean civilization.