Height is an important metaphor in Dublin. The Long Room at the Trinity College Library has high vaulted ceilings. The ancient Kings of Ireland were called the High Kings, and are commemorated on the Hill of Tara. The city's most famous contemporary monument, the Spire of Dublin spire, aka the Monument of Light, is far taller than anything else in the city.
In the same way, this enormously high statue stands at the end of O'Connell Street, the broadest boulevard in Dublin, indeed among the widest in Europe.
A 19th century leader, Daniel O'Connell was recognized internationally for his peaceful political reforms, including abolition of slavery as well as Irish Catholic Emancipation.