Seion Methodist Chapel was first built in 1806, rebuilt in 1851 and rebuilt again in 1887. The present chapel, dated 1887, is built in the Lombardic/Italian style of the gable entry type, to the design of architect William Lloyd Jones of Bangor. Seion is now Grade 2 Listed as an ambitiously scaled late ninetenth century chapel with Neo-Renaissance enrichment on the facade and quality internal timber and plasterwork.

RCAHMW, February 2010