Sent to Coventry

Where does that saying come from?

Sent to Coventry means to be shunned or ignored.

St Johns Church, Spon St.

St Johns Church, commonly known as Bablake Church  was completed in 1350. 
It became a prison for hundreds of the troops of The Duke of Hamilton during the Civil War -1647. The People of Coventry were strongly Puritan and were loyal to the parliamentary cause. Such was their  loyalty indeed that they shunned all forms of fraternisation with the prisoners who were thus completely ignored. And so it was the phrase "Sent to Coventry" was born.