Demonstrations usually take place on Saturday. Certain streets and even churches or other buildings might be closed, if they are near the gathering points. For example, the field in front of San Giovanni in Laterano is often used, and when it is, the Church is usually closed.
The demonstrations are usually colorful, music filled, and completely peaceful. This photo is of the communists and pensioners who were demonstrating against changes in government pensions in December 2003.

