made to blend in

It is not uncommon for Florentine palazzos to have inconspicuous side doors, usually service doors or side entrances to a courtyard or storage areas. This one was clearly commissioned especially to blend in with the facade and, despite the ageing of the wood, it is still pretty well camouflaged. Closer inspection revealed a slot for the post and an old doorbell, so this might have been used as a service door or was perhaps the entrance to a custodian's quarters.