Annual Arca is a pavilion in which architects and designers created a piece reproduced more than 400 times made in Oxford gray granite obtaining different tones thanks to the effect of the lights. Part of this work served to question the millionaire investments that are made for fairs of this type in which the projects have a useful life of a few days, for this reason, taking into account the economic effort, it was proposed to make a piece to be installed in Mexico City. A long-term investment, which serves the public space, while spreading collaborative work.