First gaining power as a nuncio under Boniface IX, he came into his own after abandoning Gregory XII.  
Despite King Sigismund's overtures, he refused to spend his term in Germany.  He issued a constitution to limit Gallican liberties in English-controlled parts of France and entered into a new concordat with Charles VII of France.  First gaining power as a nuncio under Boniface IX, he came into his own after abandoning Gregory XII.  Before his death he agreed to convoke the council of Basel, several years after his election at the Council of Constance.  FTP, name this pope whose 1417 election ended the Great Schism.
Despite King Sigismund's overtures, he refused to spend his term in Germany.  
Martin V or Martin the Fifth or Oddone Colonna