Right next door to that fancy Panera Bread is a fancy domus - Casa degli Epidii, the house of a dude named Epidio Rufo. Although the Epidia were a plebian family (meaning, common, not noble people), they were apparently quite rich, judging by these graceful columns in atrium, which is quite exquisite (usually, colonnades would only be in the back courtyard, peristylium). Here, impluvium (the rainwater basin) is between these columns.