Midland business leaders have called on Birmingham City Council to help fund a museum being set up remember the Elan Valley flooding.
The Institute of Directors West Midlands made the call after Birmingham's Lord Mayor signalled he would be ready to reconsider requests for money to support the new Community Museum in Rhayader, Powys.
The cash plea was initially rejected by Birmingham City Council leader Coun Mike Whitby (Con Harborne).
But now extra pressure is being put on civic leaders by the region's business community. John James, chairman of the IoD West Midlands, said people should remember the scores of residents who lost their homes when the Elan Valley was flooded 101 years ago to create the reservoir.
"Birmingham owes a major debt of gratitude to the people who, albeit through compulsory purchase, were forced out of their homes without any offer of rehousing or compensation," he said.
"I think that Birmingham councillors should think long and hard about the morality of what happened a century ago."