Final answer:
The group founded in 1506 that trekked from Canton of Ticino to St. Peter's Square is the Swiss Guard.
Step-by-step explanation:
The correct answer to the question is: A) Swiss Guard. The Swiss Guard is a group founded in 1506 that trekked from Canton of Ticino to St. Peter's Square. They are known for their role as the official protectors of the Pope and have been based in Vatican City since the 16th century.