[1] Both men held Albergati in high esteem and nominated him to crucial positions within the Roman Curia and the diplomatic service to oversee important missions.

[2][3] His student Tommaso Parentucelli later became pontiff and assumed the papal name "Nicholas" in honor of his mentor and patron.

[2] His successes led to the pope naming him as a cardinal on 24 May 1426 as the Cardinal-Priest of Santa Croce in Gerusalemme; he received that title on 27 May.

The congress failed to make peace between England and France but did effect a reconciliation between Philip the Good and the French crown of King Charles VII.

This prompted Albergati to go to Florence but later accompanied the pope to Ferrara to preside over the relocated council's first session on 8 January 1438.

On 13 February 1439 he travelled to Florence to attend another session of the council but did not sign the document that would lead to Latin-Greek Church unification even though it was something he desired.

He died in Siena at an Augustinian convent on 9 May 1443 due to a severe case of kidney stones resulting in renal failure.

He had been travelling with the pope and cardinalate to Rome from Florence but his failing health forced him to remain in Siena where he died after his condition worsened.

Eugene IV presided over his funeral on 11 May and his remains were interred in the Monte Acuto convent of the Carthusians in Florence.

His beatification received official confirmation from Pope Benedict XIV on 25 September 1744 in the papal bull Singulare Divinae Providentiae upon the recognition of the late cardinal's popular and longstanding "cultus" - or enduring veneration on the part of the faithful.