On this day in 1277, King Charles I of Naples wrote a letter granting permission to sculptor Arnolfo di Cambio to leave Rome for Perugia to begin work on a fountain for the city’s Piazza Maggiore. Charles allowed Arnolfo to collected his needed materials in Rome. Payments for the fountain have not been found prior to February 1281, raising questions as to whether Arnolfo used this royal permission slip or not. The fountain was dismantled as early as 1301, but several figures survive in the Galleria Nazionale of Perugia.
Reference: Joachim Poeschke. “Arnolfo di Cambio.” Grove Art Online. Oxford Art Online. Oxford University Press.