Viola Mónica Calligaris (born 17 March 1996) is a Swiss professional footballer who plays as a right-back or centre-back for Serie A club Juventus and the Switzerland national team.

Calligaris began playing football at FC Giswil in Obwalden at a young age.

With the U19 team, she played at the 2014 and 2015 UEFA Women's Under-19 Championship qualification phases, but Switzerland failed to qualify for both of the tournaments.

In March 2016, Calligaris debuted for the Swiss senior team in two friendly matches against the United States.

[8][9] On 24 November 2017, in a match against Belarus in the 2019 FIFA Women's World Cup qualification phase, Calligaris scored her first senior international goal.