Suzanne Kreiter/Globe Staff

Mayor Thomas M. Menino left his Hyde Park home on the morning of March 28. This afternoon, he is expected to announce he will not seek an unprecedented sixth term as mayor.

Thomas M. Menino as a District 5 city councilor in an undated photo.

Suzanne Kreiter/Globe Staff

Menino, then City Council president-turned-acting mayor, in a portrait July 21, 1993.

Jonathan Wiggs/Globe Staff

Menino greeted supporters in the North End during a parade Oct. 10, 1993.

Michele McDonald/Globe Staff

Menino cut the ribbon at the opening of the Mary Ellen McCormack housing project’s senior center Oct. 14, 1993. McCormack residents worked for eight years to get a place for seniors.

Lane Turner/Globe Staff

Menino escorted his daughter Susan into the Sacred Heart Church in Boston for her wedding ceremony Dec. 31, 1993.

David L. Ryan/Globe Staff

Judge Paul Lipcos swore Menino in as mayor of Boston Nov. 16, 1993 as Menino’s wife, Angela, looked on.

Michele McDonald/Globe Staff

As he did for many years, Menino visited the Geneva Avenue neighborhood on Christmas Eve 1993, offering help to local businesses, and asking kids like Jonathan Pagan, 8, how they were doing in school.

Frank O'Brien, Globe Staff

Mayor Thomas M. Menino gave his first State of the City address Jan. 18, 1994.

Barry Chin/Globe Staff

At Spring Unity Fest in Columbus Park, Menino prepared to signal the start of a sack race May 7, 1994.

Wendy MAEDA/GLOBE STAFF

Governor William Weld and Menino prepared to cut the ribbon during a dedication ceremony of Dudley Town Common June 8, 1996. Over his 20 years as mayor, Menino has frequented ribbon cutting and groundbreaking ceremonies.

Globe file photo

Menino on a downtown Boston rooftop in an undated file photo.

Bill Brett/GLOBE STAFF

Menino and officials from other local communities held hands on the Massachusetts Avenue bridge Aug. 6, 1996 as part of National Night Out.

TOM HERDE/GLOBE STAFF

Menino shook hands with Boston Police Commissioner Paul Evans after Menino delivered his State of the City address Jan. 14, 1997.

Joanne RATHE/GLOBE STAFF

President Bill Clinton and Menino laughed about 'gaining and losing weight' during a roundtable discussion at UMass Boston Feb. 19, 1997. Clinton was in town to support Menino's efforts to fight juvenile crime.

Mark Wilson/Globe Staff

City Councilor Jim Kelly, with whom Menino sparred on developing the South Boston waterfront for many years, made a joke about holding South Boston parking places with furniture at the St. Patrick's Day breakfast, March 20, 2005.

ELISE AMENDOLA/AP Photo

Menino in 2006 with former Boston mayors Kevin White and Raymond Flynn. White died in 2012.

Evan Richman/Globe Staff

Menino during a Dec. 5, 2008 stop in Readville on his annual trolley tour, one of many holiday tree lightings he has attended.

Dominic Chavez/Globe Staff

Menino led cyclists through downtown Boston during a program to promote cycling in the city May 12, 2008.

Wendy Maeda/Globe Staff

Menino and UMass Boston student Yorling Valdez, 18, of Dorchester, during a Massachusetts Recovery Plan press conference March 27, 2009.

Pat Greenhouse/Globe Staff

Menino and his wife, Angela Menino, walked in the Roslindale Day Parade Oct. 4, 2009.

Aram Boghosian for The Boston Globe

Menino spoke with Orlando Street residents May 28, 2012 in Mattapan after a shooting that left four injured. A 2013 Globe poll showed 49 percent of Bostonians have met Menino.

Jonathan Wiggs/Globe staff

Menino, far right, at a ceremonial groundbreaking for the Edward M. Kennedy Institute in Dorchester, April 8, 2011.

Aram Boghosian for the Boston Globe

For candidates, Menino’s endorsement has become highly coveted because of his favorable image and vast political machine. Volunteer Chuck DiPrima put up campaign signs for Elizabeth Warren and other candidates outside East Boston High School Nov. 5, 2012.

Suzanne Kreiter/Globe Staff

After eight weeks of hospitalization, Menino moved in to the Parkman House on Beacon Street to ease his commute to City Hall as he returned to work in January 2013. The mayor brought his chair from his Hyde Park home.

Barry Chin/Globe Staff

Menino, walking with a cane, entered his annual State of the City address at Faneuil Hall Jan. 29, 2013 as Kelly Clarkson’s “Stronger” played over speakers.