Final answer:
The claim that a lintel in all masonry walls carries the load from triangle-shape superimposed masonry is false; in Mycenaean architecture, other techniques such as corbeled arches and relieving triangles were used to distribute the weight.
Step-by-step explanation:
The statement that a lintel over an opening in all masonry walls is designed to carry the load from triangle-shape superimposed masonry is false. The lintel itself, especially in Mycenaean architecture, would not be sufficient to support heavy loads directly above it. Instead, the Mycenaeans developed architectural techniques such as the corbeled arch in conjunction with a relieving triangle to redistribute the load away from the lintel and into the surrounding structure.
This is evident in structures such as the Lion Gate, where the relieving triangle adorned with heraldic lions serves both a functional purpose in reducing the weight on the lintel, and also adds a decorative element. The corbel arch is a fundamental building technique where stones are laid in such a way that they project slightly over the ones below, creating a cantilevered structure that can bridge space and support weight more effectively than a flat horizontal beam could on its own.