They pay homage to the great and the good of those who have gone before us but left a legacy behind them.
From honoring nurses to war heroes and actors and even nobel prize winners here’s a round of some of the plaques in Doncaster.
Why not take a walk and see which ones you can spot.
1. Nellie Stagles
Doncaster Central MP Rosie Winterton and Mark Huby, Nellie Stagles' nephew, are pictured after Rosie unveiled the commemorative plaque to actror Miss Stagles at the Doncaster Civic Theatre
Photo: STEVE TAYLOR
2. Doncaster Plant Works
The Duke of Kent unveiled a plaque during his visit Wabtec Rail , Doncaster that celebrated 150 years. The Flying Scotsman, made at the site is behind them.
Photo: Andrew Partridge
3. Corporal John Harper
The brother and sister of Victoria Cross winner Corporal John Harper, Peter Harper and Joan Willis are pictured with the plaque in his honour, which was unveiled by Mrs Willis at the Mansion House, Doncaster in 2001
4. Winfred Booth
Unveiling a plaque in memory of Winfred Booth, Home Sister at Doncaster Royal Infirmary L to R Carole 0'Neill and Bronwen Mills with Miss Booth's brother Sydner and his wife Kathleen; and Sharon Stower, Director of Nursing and Service improvement