The Constitution of the United States was signed on September 17, 1787 in Philadelphia. More than two centuries later, many Americans say they continue to be inspired by the historic document.

The National Constitution Center has been holding activities on the Constitution's 225th anniversary, and residents in Tucson are also expressing their admiration and appreciation for the transformative work.

The Rehnquist Center at the University of Arizona's James E. Rogers College of Law held its annual Constitution Day 2012 on Friday, September 14th.

The event attracted dozens of people of different backgrounds, from attorneys and judges to students and professors.

Michael Lyons is an undergraduate student who hopes to become an attorney, following the footsteps of his mother and grandfather.

For him, the law, the courts and the constitution have always been topics of conversation.

"I think it's a very important document, it's the foundation of our country's government," Lyons says. "And I think that that's a document that transcends into modern time. It's something that's important today as it was back 225 years ago."

And observers say there are clear examples of its present-day relevance in important yet controversial topics that include illegal immigration, health care issues and laws that address voting rights.