Which landmark from Italy is closely associated with Easter celebrations?

The landmark that is closely associated with Easter celebrations in Italy is Vatican City. This is primarily because Vatican City is the spiritual and administrative center of the Roman Catholic Church, and it plays a central role during the Easter festivities. The Pope presides over several significant rituals and ceremonies, including the Easter Vigil and Easter Sunday Mass, which attract thousands of pilgrims and visitors from around the world. The highlights are often held in St. Peter's Basilica and at St. Peter’s Square, making the Vatican synonymous with Easter in the context of Christian traditions.

While the Colosseum and the Leaning Tower of Pisa are iconic landmarks in Italy, they are not directly tied to Easter celebrations. Psyanka refers specifically to the traditional Ukrainian Easter egg decorating, which does not relate to Italy's regional customs associated with Easter festivities. Thus, Vatican City stands out as the correct answer due to its prominent role in the Easter observances conducted by the Catholic Church.