Miesian Plaza (formerly known as the Bank of Ireland Headquarters) is an office building complex on Lower Baggot Street, Dublin.

It is designed in the International Style, inspired by the architect Ludwig Mies van der Rohe, particularly his Seagram Building.

Costing a total of £4.6 million, it was the most expensive office development built in Ireland at the time.

[8] An extensive redevelopment and expansion was proposed in 2008 but rejected by Dublin City Council due to the impacts on its protected architecture and surrounding area.

[10] Following the renovations carried out by John Paul Construction, the complex was renamed Miesian Plaza,[4] and in 2019 became the first development in Ireland to achieve LEED Platinum v4 certification.