An Italian electoral map template as determined the 2015 electoral law (Italicum). 606 of the 630 seats in the Chamber of Deputies are divided amongst 18 of the 20 regions (all but Aosta Valley and Trentino-Alto Adige) in 100 multi-member constituencies, each ranging between 3 and 9 seats. The multi-member constituencies are displayed in grey, with numbers indicating the number of seats allocated to the corresponding constituency.
Aosta Valley elects a single member through plurality voting. Trentino-Alto Adige elects eight members via plurality voting in single-member constituencies, with three additional seats allocated proportionally via a compensatory method. Twelve members are elected by voters abroad. The single-member constituencies are displayed in a dark grey, while the additional members for Trentino-Alto Adige and overseas voters are displayed as circles.

Source: https://documenti.camera.it/leg17/dossier/pdf/AC0468.pdf
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