Ivan Barma

Ivan Barma (Russian spelling Иван Барма) was a Russian architect and builder of the sixteenth century. According to the English Wikipedia article on him, he was probably one of the architects and builders of Saint Basil's Cathedral on Red Square in Moscow, a church built between 1555 and 1560, and he is named there as having worked on it together with Postnik Yakovlev. The article presents his role with the word probably, so the attribution to him is a scholarly inference and not a fully documented fact. His name is also remembered in astronomy: a large crater on the planet Mercury, about 128 kilometres wide, is named Barma in honor of the architect. The source gives no birth or death dates and no further biography, so none are stated here.