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Ordnance Survey Ireland

Photo: Paddy Nolan

Ordnance Survey Ireland

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Saturday 13 October, 10.00am – 5.00pm

The Ordnance Survey Office is located in the Phoenix Park and was originally located in Mountjoy House which was built in 1728. Mountjoy House later housed the mounted escort of the Lord Lieutenant who resided in the Vice-Regal Lodge (now Áras an Uachtaráin). The O’Donovan Room in the Clock Tower Building contains historical surveying equipment and information and houses the OSI Manuscript Archives. Visitors will have access to the Clock Tower Building and an external tour of Mountjoy House, the Courtyard Buildings and will be able to see a sample of the Archives.

First-come basis: Just turn up and look out for Open House Dublin volunteers. Last tour at 4pm. This tour is not suitable for children.

Designed by: Unknown
Building Date: 1728
Location: Phoenix Park, Dublin 8

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Open House Dublin is presented by the Irish Architecture Foundation (IAF): a non-profit arts organisation that communicates the value of architecture.

The IAF presents Open House Dublin each year as just one part of a rich and unique offering. Our year-round programme includes exhibitions, talks, film screenings, symposia, competitions, publications, school and community workshops. You can help to secure our future by becoming an IAF member, or simply by donating directly.

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Members enjoy perks which include: beating the OHD queues, private tours, partner discounts; and limited-edition IAF publications and prints. Architects can also claim structured CPD at all IAF events.