The Etruscan city of San Giovenale was excavated by the Swedish Institute of Classical Studies at Rome between 1956 and 1965. The ancient city plateau consists of two residential areas, the Acropolis and the Borgo, separated by a cut roadway. This publication deals only with the northwest corner of the Borgo (Borgo NW), which was excavated under the direction of Carl Nylander between 1961 and 1965. Here, in a "pocket" at the edge of the plateau, the Etruscans built a small metal working quarter, surrounded by a defensive terrace wall. Protected by the high tufa cliff a series of water cisterns and furnaces were installed. The excavations uncovered four major houses, Houses A, B, C and D, separated from each other by small drains and a Lane K.