“…The transfiguration of a place through what we have called “memorialisation” usually corresponds to the accumulation on that site of bouquets of flowers, candles, written messages, and other objects, forming what some call an “altar” or a “spontaneous shrine” (Grider ; Santino ), an “improvised”, “ephemeral”, or “popular memorial” (in contrast to the places of institutional, permanent, and often monumental memory) (Margry and Sánchez Carretero , ). This phenomenon of the “spontaneous memorialisation” of a place was studied following the death of Diana, Princess of Wales (Kear and Steinberg ; Walter ) – which probably represents the first occurrence of a media event at the global level – and also in cases as varied as the attacks of 11 September (Fraenkel ) and 11 March (Sánchez Carretero ), the school massacres at Columbine High School and Virginia Tech (Grider ), the murder of Pim Fortuyn (Margry ), and the death of John Paul II (Klekot ), to mention only a few. We should stress that, in accordance with Halbwachs' theories, materiality is a fundamental characteristic of this memorial marking of space through public mourning rituals (Doss ): the place is linked both to memories, the mental representation of a past event, and also to “souvenirs”, objects that help to recall and evoke that representation.…”