The Sigma Phi Society (ΣΦ) is the second Greek fraternal organization founded in the United States and the first to establish a chapter at another college, making it the first national Greek organization.

The William R. Thorsen House, often referred to as the Thorsen House, is a historic residence in Berkeley, California. Built in 1909 for William and Caroline Thorsen, it is one of the last of four standing ultimate bungalows designed by Henry and Charles Greene of the renowned architectural firm Greene & Greene and the only one located in Northern California.