සෙබස්තියන් දේවස්ථානය, එඬේරමුල්ල) is a Roman Catholic church in the Archdiocese of Colombo, Sri Lanka.
Construction of the current church building began in 1879, and it was operational by 1891.
A tiny fragment of Saint Sebastian's forearm bone is preserved in a special reliquary, which is located together with the Monstrance in a glass chamber inside the eucharistic chapel on the left side of the main church building.
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