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Historic memorabilia from CU president Norlin.

It started with a loud knock on Frank Tyler’s door in the dead of night in January 1874, as the story goes.

Imagine the campus without Varsity Lake — just a deep, muddy ravine channeling snowmelt down the hill.

As Japanese aircraft attacked Pearl Harbor in Hawai’i on Dec. 7, 1941, CU-Boulder President Robert L. Stearns called an emergency meeting with students in Macky Auditorium.

A 1907 photo of students at CU Boulder.

A brief history of the CU Boulder hiking club.

In 1956 CU Days became Sea U Days and had a maritime theme.

In September 1934 the women’s dormitory, now Sewall Hall, opened and is considered by many to be campus architect Charles Klauder’s masterpiece.

The university’s first football team took to the field undisciplined and without a coach. The 1890 flannel-clad sportsmen lost every game.

During John Wesley Powell’s epic western adventures during the late 1860s and early 1870s, including a pioneering float trip down the Colorado River, he collected Native American blankets.