Fallon

I am travelling to Ireland next year and would love to visit the gravesites of my ancestors.I know their dates of death but can't find the cemetries they are buried in. Their names are Malachy Fallon (1819-1884) married to Brigid (nee Mulligan) (1820-1896).They were married in St Peters Athlone in 1839. Any assistance would be greatly appreciated. many thanks Sheryl