What is the name of the rainwater basin typically located in the center of an atrium in Pompeian homes?

The rainwater basin typically found in the center of an atrium in Pompeian homes is called an impluvium. This architectural feature served a practical purpose, collecting rainwater that would run off the roof and funnel down into the open atrium area. The impluvium often had a slight depression to effectively gather water, which could then be used for various household needs.

In the context of a Pompeian home, the impluvium not only provided a water source but also contributed to the overall aesthetic and function of the atrium, which was often an important social and familial space. This element exemplifies the sophistication of Roman engineering and their ability to integrate utility with design in domestic architecture.

The other terms refer to different aspects of Roman life or architecture. The lararium is a household shrine, the insula is a type of apartment building, and the lupanar refers to a brothel, none of which relate to the rainwater collection system found in the atrium.