Chrono for Francesco Giorgio
by al klisiak

1439 b. 
c.? trained in the workshop of Vecchietta
c.1471 his painting the "coronation of the virgin" fin.
c.1475 "Nativity" fin.
1477 in Urbino, working for Federigo da Montefeltro as
  a military engineer, fortifications expert and medallist
1485 returns to Siena
1485-1516 designed church of Sta Maria del Calcinaio
1489-97 works and finishes his two Bronze angels
c.1497- writes an architectural theses, "Trattatoo,di
  architettura civile e militare"
1501-2 d.
1841 his "trattato di architettura civile e militare" publ.