An account of some Irish Holy Saturday / Easter Vigil traditions and customs:

Christ Enthroned from the Book of Kells (c. 800 AD)

"Rome is wrong, Jerusalem is wrong, Alexandria is wrong, Antioch is wrong - the whole world is wrong: only the Irish and British know what is right!" - 632 AD, the Irish scholar Cummian's response to Rome in defense of the Irish dating of Easter.

In 600 AD, St Colmcille sent a letter to Pope Gregory I condemning the Roman version of the Easter calendar, saying that Irish scholars had examined it and had found it "more worthy of pity and ridicule than of authority"- https://en.m.wikipedia.org/wiki/Easter_controversy

A papal delegation to England in 605 AD reported meeting St Colmcille. Upset at his stance on the Easter dating they remarked "On the outermost fringes of the known world" [the Irish] "pimples on the face of the earth" set themselves against us everywhere in the world!

On This Day in 1897 – Birth of Tom Barry, in Co Kerry, one of the most prominent guerrilla leaders in the Irish Republican Army during the Irish War of Independence.
https://archive.li/wlw3L

Armais Mhumhan, Uladh, Chonnacht, agus Laighean i Halla na Caithreach Átha Cliath, i stíl an fhreascó.

The Coats of Arms of Munster, Ulster, Connacht, and Leinster in Dublin City Hall, in fresco style.

Lambert Simnel ar iompar trí shráideanna Bhaile Átha Cliath, 1487 A.D.

Lambert Simnel carried through the streets of Dublin, 1487 A.D.
https://en.m.wikipedia.org/wiki/Lambert_Simnel

Cuireann Fir Éireann in Aghaidh Teacht i dTír Loingeas na Lochlannach

Irishmen Oppose the Landing of the Viking Fleet
https://www.historyireland.com/volume-22/clontarf-1914-nationalist-commemoration-

Tugtar Cáin an Óir do Mháel Sechnaill II, Rí Teamhrach, ó Bhaile Átha Cliath

Mael Sechnaill II, King of Tara, receives the Tribute of Gold from Dublin
https://archive.li/BKXOl

Brian Bóramha, Ard Rí na hÉireann, ag tabhairt aithisc os comhair a airm roimh Chath Chluain Tarbh, 1014 A.D.

Brian Boru, High King of Ireland, addresses his army before the Battle of Clontarf, 1014

Tristran agus Iseult

Tristran and Iseult
https://en.m.wikipedia.org/wiki/Tristan_and_Iseult

Pairlí idir Lorcán Ua Tuathail agus Strongbow lasmuigh de Bhaile Átha Cliath, 1170 A.D.

Parley Between St. Laurence O'Toole and Strongbow outside Dublin, 1170 A.D.