Update at 5:30 p.m.: Read Fred Thys' feature on the inauguration here.

New Boston Mayor Martin Walsh salutes the crowd at his inauguration Monday at Boston College. (Jesse Costa/WBUR)

Update at noon:

A new era has begun in Boston.

Martin Walsh, of Dorchester, was sworn in as mayor this morning — the first change in city leadership in two decades.

Walsh replaced Thomas Menino, Boston's longest-serving mayor.

In his inaugural address, delivered in front of thousands at Boston College's Conte Forum, Walsh spoke of improving opportunity for all of the city's residents.

He listed several priorities, including "stopping senseless gun violence," making "sure every kid gets a great education" and "increasing trust and transparency in city government."

He said he would convene a meeting today on public safety, and begin conversations on finding a new school superintendent tomorrow.

He also reaffirmed his plan to reform the Boston Redevelopment Authority, pledged to create a new city Ethics Committee, and committed Boston to joining the Alzheimer’s Early Detection Alliance.

Walsh stressed inclusiveness in moving the city forward. "We are in this together," he said.

The former state representative and labor leader also promised to continue to listen to constituents. “I will listen. I will learn. I will lead,” he said.

Here are our updates as the ceremony unfolded:

11:40 a.m.: Near the close of his speech, Walsh brings up his predecessor, former longtime Mayor Thomas Menino. Said Walsh, of Menino: "His legacy is already legend and his vision is all around us."

11:36 a.m.: Another priority:

I will work to create a new city Ethics Committee so we can establish and enforce stronger ethics rules and more disclosure for city elected officials and senior level employees.

11:35 a.m.: Walsh says "too many of our seniors are struggling," as he speaks about "creating more housing for seniors in the wake of deep federal budget cutbacks." He also says "I will commit Boston to joining the Alzheimer’s Early Detection Alliance."

11:32 a.m.: