Generate a realistic architectural floor plan of a Renaissance-era Italian palace, as if it were a project from that time. The layout should reflect the typical features of 15th-16th century palaces, including a central open courtyard (cortile), symmetrical arrangement of rooms around it, and grand public spaces like a large salon or reception hall. Highlight the use of thick stone walls, arcades with columns, and vaulted ceilings. Show key areas like private chambers, service rooms, a grand staircase, and corridors, with attention to period-accurate proportions, materials, and construction methods used during the Italian Renaissance in realistic style