Original: Instead, Cromwell was ceremonially re-installed as Lord Protector on 26 June 1657 (with greater powers than had previously been granted him under this title) at Westminster Hall, sitting upon King Edward's Chair which was specially moved from Westminster Abbey for the occasion.
Simplified: Then he rejected it and was ceremonially re-installed as "Lord Protector" (with greater powers than had previously been granted him under this title) at Westminster Hall.