Roman builders perfected the semicircular arch made of separate blocks of stone.

罗马的建造者完善了由不同的石块构成的半圆形拱门。

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That invention was the arch, a curved structure originally made of separate stone or brick segments.

这一发明就是拱门，一种最初由分段的石头或砖块组成的弧形结构。

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Ponte Vecchio in Florence is one of the famous tourist attractions in Italy, and considered as the oldest stone arch bridge in Europe.

佛罗伦萨的维奇欧桥是意大利最著名的旅游景点之一，并且被认为是欧洲最古老的石结构桥梁。

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He has suggested a steel frame and a stone outer shell, leaving enough space for stairways, lifts and service ducts leading to the space in the pediment above, and a basement - possibly a nightclub - linking the arch with the existing stone lodges on either side.

BBC: 'Romantic' attempt to save lost arch