Hatchment
A hatchment is a diamond-shaped board made of wood or wood and canvas.
It bears the arms, crest or motto of a deceased person.
Hatchments were carried in front of funeral processions to the church, and afterwards hung on the gate of the deceased person's house.
After it had been hung on the gates for several months, it was taken down and hung in the church.
(text and images courtesy of Heritage Inspired)