https://twitter.com/realDonaldTrump/status/1017190186269184001
i always thought of this one , in the vatican
>pic related
"It's a strange object. There is, for a start, something curious about its proportions. The seat is very high and has cut into it a keyhole shape, the stem open to the front. On closer examination it could be an elderly, rather grand commode, once used by popes…. However, the chair back is at a curious reclining angle, far too relaxed, it would seem, for any practical bodily movement. And the legs, too, are unusual… leaving the centre, under the keyhole, open and uncluttered."
"Variously known as the sedia stercoraria – which translates as the 'dung chair'– or rather more understandably, as the 'pierced chair', this then was the object used to test the sex of newly installed popes… Any candidate chosen by his peers to occupy the papal throne was required, before his election could be verified, to sit on this elaborate seat while a young cardinal took advantage of the design to touch his testicles."
https://www.bibliotecapleyades.net/vatican/esp_vatican39.htm
this chair is housed in the vatican, if interested , look up the legend of Pope Joan. Afterwards it was used to ensure the new pope was indeed male , by physical examination of the testicles. The existence of Pope Joan is denied by the vatican , but many early accounts exist , and this chair exists in the vatican.