Sinn Féin leader Gerry Adams paid tribute to his fellow politician and friend following the announcement of his death this morning.
A prolific Twitter user, Mr Adams posted a link to 'A Song for Ireland', recorded by Irish musician Luke Kelly before his death in 1984.
Mr McGuinness passed away in the early hours of this morning.
He had been diagnosed with heart disease in December.
Mr Adams wrote this morning; "A song for Martin McGuinness. I measc Laochra na n-Gael go raibh a anam dílis", meaning "A faithful soul among the heroes of Ireland."
Speaking this morning Sinn Féin President Gerry Adams TD said: “Throughout his life Martin showed great determination, dignity and humility and it was no different during his short illness.
“He was a passionate republican who worked tirelessly for peace and reconciliation and for the re-unification of his country. But above all he loved his family and the people of Derry and he was immensely proud of both.
“On behalf of republicans everywhere we extend our condolences to Bernie, Fiachra, Emmet, Fionnuala and Grainne, grandchildren and the extended McGuinness family.
“I measc laochra na nGael go raibh a anam dílis.”
In January Mr McGuinness stepped down as deputy First Minister amid the so-called cash-for-ash scandal which saw DUP leader Arlene Foster come under mounting pressure to resign.
Mr McGuinness’s resignation triggered a snap election which changed the landscape in Stormont.
Mr McGuinness emerged as one of the major player’s in Northern Ireland’s peace process and became Sinn Fein’s most recognisable face after Gerry Adams.