Seán Mac Diarmada, Irish political activist and revolutionary leader also known as Seán MacDermott, is born in Corranmore, near Kiltyclogher in County Leitrim on February 28, 1883. He is one of the seven leaders of the Easter Rising of 1916 and a signatory of the Proclamation of the Irish Republic.
Mac Diarmada is educated by the Irish Christian Brothers. He moves to Dublin in 1908, by which time he already has a long involvement in several Irish separatist and cultural organisations, including Sinn Féin, the Irish Republican Brotherhood (IRB), the Ancient Order of Hibernians, and the Gaelic League. He is soon promoted to the Supreme Council of the IRB and is eventually elected secretary.
In 1910, he becomes manager of the radical newspaper Irish Freedom, which he founds along with Bulmer Hobson and Denis McCullough. He also becomes a national organiser for the IRB and is taken under the wing of veteran Fenian Tom Clarke and the two become nearly inseparable. Shortly afterward, Mac Diarmada is stricken with polio and is forced to walk with a cane.
In November 1913, Mac Diarmada is one of the original members of the Irish Volunteers and continues to work to bring the organisation under IRB control. Mac Diarmada is arrested in Tuam, County Galway, in May 1915 under the Defense of the Realm Act for giving a speech against enlisting into the British Army.
Following his release in September 1915, Mac Diarmada joins the secret Military Committee of the IRB, which is responsible for planning the rising.
Due to his disability, Mac Diarmada has little participation in the fighting of Easter week, but is stationed at the headquarters in the General Post Office (GPO), as one of the Provisional Republican Government. Following the surrender on April 29, 1916, he nearly escapes execution by blending in with the large body of prisoners but is eventually identified by Daniel Hoey of G Division. Following a May 9 court-martial, Mac Diarmada, at the age of 33, is executed by firing squad. Before his execution, Mac Diarmada writes, “I feel happiness the like of which I have never experienced. I die that the Irish nation might live!”
In September 1919, Hoey is shot dead by Michael Collins’s Squad. Likewise, the British Officer who ordered Mac Diarmada to be shot rather than imprisoned, is also killed in Cork on Collins’s order during the Irish War of Independence.
Seán MacDermott Street in Dublin, Mac Diarmada rail station in Sligo, and Páirc Sheáin Mhic Dhiarmada, the Gaelic Athletic Association stadium in Carrick-on-Shannon are named in his honour. Sean MacDermott tower in Ballymun, demolished in 2005, was also named after him. In his hometown of Kiltyclogher a statue enscribed with his final written words is erected in the village centre and his childhood home has become a National Monument.
Mac Diarmada will be portrayed by actor Colin Morgan in the 2016 Irish historical biopic drama film, The Rising, written by Kevin McCann and Colin Broderick.