What made this possible was the use of prefabricated elements.

使这成为可能的是预制构件的使用。

The site is the final resting place of an ancient Roman ship, which sank in the sixth century AD while ferrying prefabricated marble elements for the construction of an early church.

这个地点是一艘古罗马沉船最终落脚的地方，它在公元六世纪沉入了海中，当时它正在运输用于建筑早期教堂的预先构件的大理石原料。