Permission to build a large mosque in West Dublin is being appealed to An Bord Pleanala.
It's over concerns about taffic congestion and claims a call to prayer would cause noise pollution.
A Dublin neurosurgeon, who's behind the project in Blanchardstown, is dedicating it to the memory of his family.
Dr Mohammed Taufiq Al Sattar's wife and children were killed in an arson attack in England in 2013.
He says objectors must not have read the application because there will be not be a call to prayer: