Lazarus Colloredo and Joannes Baptista Colloredo (1617 – after 1646) were Italian conjoined twins who toured in 17th-century Europe.
The upper body of Joannes Baptista (named after John the Baptist) and his left leg stuck out of his mobile brother. He did not speak and kept his eyes closed and mouth open all the time. According to a later account by Copenhagen anatomist Thomas Bartholinus, if someone pushed the breast of Joannes Baptista, he moved his hands, ears and lips.
Contemporary accounts described Lazarus as courteous and handsome but for his brother who just dangled before him. When Lazarus was not exhibiting himself, he covered his brother with his cloak to avoid unnecessary attention.
Later accounts claim that Lazarus married and sired several unmutated children.