In 1932, the Ethnographical Museum of Sweden sent an archaeological expedition to Mexico under the direction of Sigvald Linn? to determine the full extent of this ancient Teotihuacan occupation and to collect exhibit-quality artifacts. Of an estimated 2,000-plus residential compounds at Teotihuacan, only 20 apartment-like structures were excavated at the time. Yet Linn?’s work revealed residential patterns that have been confirmed later in other locations. Some of the curated objects from the Valley of Mexico and the adjacent state of Puebla are among the most rare and unique artifacts yet found. Another important aspect of this research was that, with the aid of the Museum of Natural History in Washington, Linn?’s team conducted ethnographic interviews with remnant native Mexican peoples whose culture had not been entirely destroyed by the Conquest, thereby collecting and preserving valuable information for later research.