It is those Roman numerals again!

 St Aelhaiarn, Guilsfield, Powys, Wales
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The site of St. Aelhaiarn’s Church appears to be of early medieval origin, and is believed to have been founded by St. Aelhaiarn in the sixth century. Much of the visible church standing on the site today dates to the fourteenth and fifteenth centuries, but the core is of the twelfth and thirteenth centuries. Thorough restoration work was carried out by G.E. Street in 1877-9, in which many of the original features of the building were swept away, but the church does nonetheless retain some early points of interest, most particularly the octagonal twelfth century font with four large masks.
 The arrangement of the text has been far made more complex than it need have been. It is those Roman numerals again!   
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