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Slideshow: Princeton alumni to make memories at Reunions .

This year, more than 20,000 Princeton University alumni, family members and friends are expected on campus for Reunions 2012, creating memories that will last a lifetime. Before the event — which runs Thursday through Sunday, May 31 through June 3 —  dozens of alumni submitted photos via email and social media to be featured in a slideshow highlighting past Reunions.

Slideshow: 'Looking Back: Reunions and Commencement 2014' .

Princeton University students, alumni and their families recently celebrated Reunions and graduation activities, filling campus with spirited displays of emotion. This video slideshow captures some of those moments.

Video feature: 'Looking Back: Reunions and Commencement 2013' .

With hugs and laughs, humor and nostalgia, parades and processions and traditions, Princeton University students, alumni and their families recently celebrated Reunions and graduation activities.

Slideshow: 'Looking Back: Reunions and Commencement 2014' .

Princeton University students, alumni and their families recently celebrated Reunions and graduation activities, filling campus with spirited displays of emotion. This video slideshow captures some of those moments.

'Looking Back: Reunions and Commencement 2013' .

With hugs and laughs, humor and nostalgia, parades and processions and traditions, Princeton University students, alumni and their families recently celebrated Reunions and graduation activities.

Goin' Back: Reunions 2012 .

Each year, thousands of alumni return to Princeton for Reunions, where they learn, laugh and reconnect with their classmates and the University. Here's a look at this year's festivities.

Doorways of Princeton .

These 20 distinctive doorways at Princeton University span more than 700 years of architectural styles.