What is lorenzetti?

Some articles on lorenzetti:

Santa Maria Della Scala (Siena) - Frescos
... from the Virgin’s early life where chosen the Birth of the Virgin, by Pietro Lorenzetti the Presentation of the Virgin in the Temple by Ambrogio Lorenzetti the Betrothal of the Virgin and the ... Simone Martini and the Lorenzetti brothers were not only the most talented painters in Sienese art during this time, but they were the brains behind the leading painting workshops/sch ... Simone Martini and the Lorenzetti brothers were chosen for this commission due to their expertise and reputation ...