Preaching program in Bologna, Italy (Album with photos)
Srila Prabhupada: Others, who are not devotees, may think, “How can people devote so much time simply to talks of God?” The chanting of the Hare Krishna mantra is simply the repetition of three words, Hare, Krishna, Rama, but still devotees can go on chanting this Hare Krishna mantra twenty-four hours a day without feeling fatigued. (Srimad-Bhagavatam, 4.13.1Purport)
Find them here: https://goo.gl/2qhNhV