Lippo Memmi 1285-1361

Sienese painter, Simone Martini's brother-in-law and most able follower. They jointly signed the celebrated Annunciation (Uffizi, Florence, 1333) and their respective shares in it are uncertain. Several other works are signed by Memmi, including Madonnas in the Staatliche Museen, Berlin, and the Church of the Servites at Siena, showing his refined draftmanship, delicate palette, and extremely sensitive modelling. He was not an innovator, but an indication of the high quality of his work is that several paintings are disputed between him and Simone. From Web Gallery of Art

Memmi's Frescoes, im San Gimignano

San Gimignano, Palazzo Pubblico Lippo Memmi, Maesta (1318)

There are also a series of frescoes in the Palazzo Publico by Mommo di Filippuccio which illustrate the daily life in San Gimignano during the treicento. They are not great art but highly illustrative. Because some of them show delicate scenes. I can find only one relatively harmless reproduction in the internet.