Cornerstone


Pietra angolare


Meanings
Fig.: something of great importance on which everything else depends

Examples
The corner stone of the candidate's political program was to lower taxes for everyone!
La pietra angolare del programma politico del candidato era abbassare le tasse per tutti!

“Paisà” by Rossellini is a cornerstone in Italian movie history
Il film “Paisà” di Rossellini è una pietra angolare del filone neorealistico italiano

In most Countries, the family is still the cornerstone of society
In molti Paesi del mondo, la famiglia è ancora la pietra angolare della società

Origin
A cornerstone is the first stone set in the construction of a masonry foundation. All other stones will be set in reference to this stone.
St. Paul uses this expression referring to Jesus Christ.