What is the setting of The Recognitions a Novel by William Gaddis?

There are multiple physical settings for this novel such as Greenwich Village, Paris, Madrid, Italy, and more but the actual setting is within the minds and psyches of the major characters, each as they struggle to resolve their existential dilemma of identity and purpose. In this regard, physical settings are mere superficialities that serve as a backdrop to these inner struggles that are much the same in every character regardless of locale.