This document provides information on several artworks from the Northern Renaissance and Italian Quattrocento periods. It describes Robert Campin's Mérode Altarpiece, highlighting symbols like candles and flowers. It also summarizes Hugo van der Goes' Portinari Altarpiece, noting figures' sizes and symbols like wheat. Pietro Perugino's fresco Christ Delivering the Keys to Saint Peter is analyzed for its use of linear perspective and figures lined up in a classical plaza.