the entrance gate to the ancient charterhouse of pisa, calci, italy

architecture arch facade iron window building landmark cathedral chapel symmetry church synagogue palace column monastery estate art entrance gate ancient charterhouse pisa calci italy europe ancient arch architecture art beautiful blue building calci carthusians cathedral certosa charter house chartreuse church city detail door entrance europe facade famous framed garden gate gothic historic historical history italian italy medieval meditation monastery old palace pisa quiet religion renaissance sky spirit statue stone sunny tourism tourists tranquility travel tuscany