The Norton Simon museum in Pasadena, California collection includes a very large Tiepolo, "The Triumph of Virtue and Nobility Over Ignorance" (1740-50, perhaps 1743). Their web site mentions "This painting was designed for a ceiling in the Palazzo Manin in Venice. Virtue is dressed in white with a sun symbol on her breast. Beside her, Nobility holds a statuette of Minerva and a spear. To the left, Fame blows her trumpet. Below, the figure of Ignorance is being vanquished."
Even though it's a ceiling painting, it works fairly well when displayed on a Norton Simon wall. The main ceiling effect is that the depictions are made from a low point of view.
Typical of Tiepolo, Virtue is represented by the pouty blonde model found in many of his works.