In the late 1800’s, Edward Costello, a town businessman, built as a memorial and burial crypt for his late beloved wife Mary Josephine. Edward himself was later entombed in the Chapel in one of the largest funerals held in Carrick-on-Shannon for the time. The Irish “Taj Mahal”, it is the smallest chapel in Europe, measuring only 16 ft x 12 ft, and reputedly the second smallest in the world. It is located at the junction of Main & Bridge Streets, opposite the Town Clock. The Chapel underwent substantial restoration in 2009/2010 — roof repair, resetting the marble altar, refurbishment of the burial chambers, cleaning of stained glass and other restorative and conservation works, and has a steady stream of visitors.