Giovanni Battista Piranesi, Interior view of St. Peter's Basilica in the Vatican, from Vedute di Roma (Roman Views), c.1748 via MetMuseum.org
This guide provides recommended research tools and skills for your ARTH 396 research assignment.
The attached brainstorming worksheet may give you some ideas.
When analyzing a work of art, it's helpful to develop and apply a list of relevant questions. Consider:
Barnet's A Short Guide to Writing About Art provides many useful examples of analytical questions and is a required/recommended text for most ARTH 100/102 courses.