Jonathan Trelawny who was ordained in 1673, was one of seven bishops charged with high treason and imprisoned in the Tower of London for refusing to implement King James II's Declaration of Indulgence granting religious tolerance to Catholics.
London and Dublin hope their document will result in a historic declaration from the Irish Republican Army (IRA) that it will abandon all paramilitary activity.
He said he had bought the London home in 1991, before becoming an MP and had his tax declaration checked when he sold it in 2006 - he said HMRC had confirmed there was no liability for CGT.
In future peers will have to sign a declaration "stating the location of their principal residence, and giving confirmation that it is outside Greater London".