The Chantry Chapel in St. Mary the Virgin Belchamp Walter
The remains of the Chantry Chapel are one of the most striking artifacts that you will find in the Church. The entrance arch is surrounded by Medieval Wall Paintings, the dates of their painting is under speculation.
The significance of this chapel seems to be overlooked by many who encounter it. This seems to be the case with the casual visitor and by those that visit the Church on a regular basis. Belchamp Walter and the country in the 14th and 15th centuries would have seen this chapel as an important feature. The description of the Privately Built Chapel (Chantry) on Wikipedia gives a clue to this significance.
The destruction of the chapel, presumably in 1574 if the graffiti on the right hand pillar is authentic, was due to reformation actions taken by the Tudors

The definition of a Chantry: - from the Wikipedia page
The descritption of the chantry from the Church guide.
Britsh History On-Line says:
The "said to be" statement is curious here as the shields of arms were identified ( I think correctly).
Shields of Arms
The description from BHO describes: "a quarterly bend, for Beauchamp" as seen on the Chantry Arch.
A bendy or bend is a diagonal stripe on the coat of alms.
Background to this page
Having seen this page found by those making an Internet search I have decided to add a bit more context.
The statement made by British History On-line that the tomb is "said to be of Sir John Boutetort, 1324 or 1325, and Maude (Fitz-Otes) his wife", is pretty much confirmed by the presence of the coats of arms that adorn the remains of the arch. There are also those of Botetourt, Fitz-Otho (Fitz-Otes impaling Boutetort) and de Beauchamp.
Inscription (carving/graffiti) on left column - BIQUG---- TUYU---? 1574 - probably the person commissioned to destroy the chantry. At first I thought this was a Civil War "fallout" but the dates do not match. I now think that the Chantry was destroyed 100 years previous to the Civil War.
This was due to the continuation of the English Reformation by the Elizabethan monarchy.
The destruction/removal of the Chantry Chapel is another example of the Lost Heritage that is rife in many English churches. The significance of the Botetourt connection to the village of Belchamp Walter is equal to that of the marriage between Geofrey de Mandeville to Rohse de Vere ans the possible destruction of a memorial that was located in the Chancel of St. Mary's.