This complex structure contains the two-story mud and stone building presented to the United States in 1821 by Sultan Moulay Suliman. The first property acquired abroad by the United States government, it housed the United States Legation and Consulate for 140 years, the longest period any building abroad has been occupied as a United States diplomatic post. It is symbolic of the 1786 Moroccan–American Treaty of Friendship, which is still in force today.