FOTHERINGHAY-CASTLE, (Northamptonshire) in which Mary Q. of Scots was beheaded, is on the S. E. side of Kings-Cliff, near the r. Avon or Nen. The castle, which is very ancient, was, in the R. of Hen. III. possessed by the Earls of Chester, and afterwards by the Earls of Winchester; but K. Edw. III. assigned it for an appennage to his son, Edmund Langley D. of York, who rebuilt it, and made the keep of it in the form of a horse-fetter. His son, Edward D. of York, in the R. of Henry V. founded and endowed a fine collegiate Ch. here, in which he was interred. K. Richard III. was born in this castle.