Since last fall, Columbia senior Emma Sulkowicz has been dragging her dorm room mattress around campus to protest the University's handling of rape allegations she filed against her classmate, Paul Nungesser. In September, she vowed to carry the mattress until Nungesser was expelled, or until her graduation—which ever came first.

Nungesser didn't get the boot, and true to her word, Sulkowicz bore her mattress across the stage this afternoon, as part of College Class Day, a special honors ceremony that precedes Columbia commencement, which is happening tomorrow, Mashable reports. Columbia Spectator editor Teo Armus captured the scene, noting that four friends helped Sulkowicz navigate the stage.

According to Mashable, students were directed not to bring heavy objects with them to today's ceremony. However, Armus tweeted this morning that Sulkowicz received "no direct communication" about her mattress in the days leading up to the ceremony. Still, she was reportedly asked to leave her mattress in nearby Lerner Hall during the ceremony, and pick it up afterwards.

Sulkowicz ignored this request. When her name was called, her classmates cheered. The applause drowned out several names that followed.

When she reached the podium, Sulkowicz did not shake hands with President Lee Bollinger, as is custom.

During her junior year at Columbia, Sulkowicz reported to the administration that Nungesser had beaten, strangled, and raped her. Columbia deemed him "not responsible," prompting Sulkowicz to take her case to the NYPD that summer. The NYPD filed a report, and that was about it. Nungusser filed a federal discrimination lawsuit against Columbia this spring, on the grounds that the University let Sulkowicz smear his reputation.

We have reached out to Columbia for comment and will update accordingly when we hear back.

UPDATE: A Columbia spokeswoman issued the following statement this afternoon:

“We communicated to all students that the shared celebratory purpose of Class Day and Commencement calls for mutual respect for the security and comfort of graduating students and their families in attendance. We are not going to comment on individual students; it is a day for all members of the Class of 2015. We were not going to physically block entry to graduates who are ultimately responsible for their own choices.”

UPDATE: According to the NY Times, Sulkowicz did not refuse to shake President Bollinger's hand, as previously reported. The paper reports that:

As Ms. Sulkowicz and her friends ascended the stage, Mr. Bollinger, who had been shaking the students’ hands, turned his back and leaned down as though to pick something up from his seat. Ms. Sulkowicz leaned over the mattress, trying to catch his eye, then straightened up and kept walking, shrugging with her free hand.