The Ospedale degli Innocenti ('Hospital of the Innocents') was a children's orphanage in Florence, designed by Filippo Brunelleschi in 1419. It is regarded as a notable example of early Italian Renaissance architecture. There was a door with a special rotating horizontal wheel that brought the baby into the building without the parent being seen. This allowed people to leave their babies, anonymously, to be cared for by the orphanage. This system was in operation until the hospital's closure in 1875. Today, a more modernized version exists, as displayed in the video.
