Building One consists of three halls. The three halls contain artifacts from the lower, middle, and upper Paleolithic, as well as the Neolithic, Chalcolithic, early and late Bronze Age, and Iron Ages I-III, through the Median, Achaemenid, Seleucid, Parthian, and Sassanid periods.
The post-Islamic part of the museum was inaugurated in 1996 and consists of three floors. It contains various pieces of pottery, textiles, texts, artworks, astrolabes, and adobe calligraphy from Iran's 1,400-year Islamic history.
The original museum (Building One) was designed by André Godard, a French architect. It is located in central Tehran.
Plans are underway for the construction of a new building, as the current one lacks the capacity and standards for preserving all of Iran's excavated treasures. There are a number of research departments in the museum, including the Paleolithic Department, Center for Achaemenid Research, and Center for Ceramic Studies.