The Lionet Bronze Cloth is the cloth of the Saint Ban in Saint Seiya, Bleriot in Saint Seiya: The Lost Canvas, and Sōma in Saint Seiya: Omega. It is of the lowest class of the cloths that Athena’s Saints wield, the Bronze Cloth.
The constellation of Leo Minor was originally part of the Leo constellation, un-separated. It was separated from the Leo constellation after the ancient myths were formed, not having a myth of its own.
Ban trained to be a Saint in Mt. Kilimanjaro, Tanzania during the period the other orphans were. The cloth was likely kept in this area by his master to be given to one who was proved to be a Saint. During The Lost Canvas, Bleriot is the Saint who receives the Lionet Bronze Cloth. It is not revealed where he got his cloth, having had it since the beginning of the series.