Pope Marcellus II reigned from the 9th to the 30th of April 1555, making his one of the shortest papacies on record.
Because of this, knowledgeable sources estimate there may be no more than five or six signed documents attributed to him outside of the Vatican. His is notoriously known as among the rarest of all papal signatures.
My Reverend Father, Illustrious and most respected Lord
The fifteen scudi per month at the behest of our Lord given
By Sir Egidio Zefiro to the Archbishop Goto, are not given
[this time] because with this reliance he should put himself
On his way to the place of the Council, and in order to help
Him when he will stop in Rome, where he should not move—
Having been the Council concluded since a long time—until
Further orders from his Holiness which, as they made clear,
I believe that his Holiness won’t hesitate to increase his
Commission as I already wrote in more detail to the
Archbishop and could not anything further, except to say
That I will always do anything for your benefit, to his soon
Holiness and Cardinal Farnese of ours, as I did until today.
To your Reverend Lordship I humbly commend myself to You
From Forli, the XIIII of March 1543
On the Backside:
To the Reverend and Illustrios Lord of mine, most respected
Monseigneur the Cardinal of Carpi, legate, etc.
[note of the chancellery]
1543 18th of March, Rome
From Forlì 14 as indicated from Cardinal of Saint Cross
Response on behalf of the Archbishop Gotho