Brazillian footwear maker Melissa and 3M teamed up to create an open exhibit on the power of love, dubbed “Galeria Melissa.” 350,000 Post-It notes were used to make the display, and since it was open to the public, 30,000 of them ended up with messages of love written on them from São Paulo residents. It took a total of 5 months to make the display culminating in a succinct time-lapse video (below).