A new €175 million state-of-the-art science centre has opened at University College Dublin.
The O'Brien Centre for Science will be home to 2,500 undergraduates and postgraduate students, as well as research and academic staff.
It took three years to build and includes a mixture of both new space and refurbished older buildings.
Funded by the State and philanthropic donations, the new centre marks the completion of the second phase of the €300m project with a third at planning stage.
The final complex will be the single largest capital investment in science in the history of the State.
Speaking at the opening ceremony, UCD President Hugh Brady said the building will compete with the very best in the world.
Minister for Education Ruairi Quinn praised those behind the project, saying it would become an iconic example of how to design a science building.