The four chosen frontrunners
• Mater Hospital
What's on offer? Free site backed by the Mater, Rotunda and Temple Street hospitals.
Cost: €582m for a children's hospital and a maternity hospital.
When could it be built by? Children's hospital by 2016; maternity hospital later.
• St James's Hospital
What's on offer? Free site backed by St James's and Crumlin hospitals.
Cost: €604m for both hospitals.
Built by: Children's hospital by 2015; maternity hospital later.
• Connolly Hospital, Blanchardstown
What's on offer? Free site backed by Connolly and Beaumont hospitals and the Royal College of Surgeons.
Cost: €424m for children's hospital.
Built by: 2016.
• Belcamp, near airport
What's on offer? Sites owned by the IDA and NAMA and backed by Beaumont Hospital
Cost: No details given.
Built by: No details given.