In 1875, when the two Portico Palaces were finally completed, new funding problems endangered the realization of the two triumph arches that were included in the design; Mengoni eventually decided to fund the construction himself.
Aastal 1875 kui kaks "Portico paleed" viimaks valmis said, seadsid uued finantseerimisprobleemid ohtu kahe plaanis olnud triumfikaare teostamise ning Mengoni otsustas viimaks nende ehitust ise finantseerida.