Trinity Hall, Dublin

Trinity Hall (Irish: Halla na Tríonóide) is the main extramural hall of residence for students of Trinity College in Dublin, Ireland. It is located on Dartry Road in the Dartry neighbourhood, part of the affluent suburb of Rathmines and about 4 kilometres (2.5 mi) south of the College's main campus. Trinity's Botanic Gardens share the site. Trinity Hall is linked to the city centre campus by direct Dublin Bus route and the Luas light rail system via the Milltown Luas stop.

The first extramural hall established by Trinity College under the name Trinity Hall was located near Hoggen Green (now College Green), on land which had originally been intended for use as a 'bridewell' or house of correction for vagrants. The land, located to the west of Trinity, was sold to the college by Dublin Corporation for the sum of £30 on condition that it be converted for educational use. A Master was appointed, buildings were constructed, and the site was used for teaching and residence by students from 1617 onwards.

However, during the course of the 1641 Rebellion, the site was occupied by poor people from the city. The hall having fallen into decay (which the college at the time could not afford to repair), Trinity discontinued its teaching there, causing the corporation to seek that the site revert to their ownership on the grounds that the agreements for its use were not being upheld. The situation was resolved by John Stearne, a medical doctor and senior fellow at Trinity, who arranged to have the hall repaired without further expense to the college in return for himself being made its president and for the site being redesignated for the sole use of physicians. The daughter college thus founded in 1654 eventually received a royal charter as the Royal College of Physicians of Ireland in 1667, and in the years following Stearne's death it gained virtual independence from Trinity.

The grounds comprising the current Trinity Hall first came under the college's ownership in 1908 when a house named 'Glen-na-Smoil' was purchased in Dartry as a move towards establishing a hall of residence for women. At the time of Trinity Hall's establishment, women had to leave the College campus before 6pm, had to wear 'cap and gown' and could not visit private rooms unless accompanied by a chaperon. Much of the funding came from donations by the Chancellor, Lord Iveagh, and Frederick Purser, a senior fellow, as well as almost all of the fees paid by female Oxford and Cambridge students (the so-called steamboat ladies) for conferral of University of Dublin degrees under the system of ad eundem gradum recognition that exists between the three universities (Oxford and Cambridge not permitting female students to receive degrees for their study at the time). The site was extended in 1910 with the donation of the adjacent Palmerston House and its grounds by John Griffith, who renamed it Purser House in memory of the then-deceased Sarah Purser, a relative of his.

In its early years, under the leadership of the first distinguished warden, Miss E. M. Cunningham, it was run as a strictly female institution providing a sheltered environment for young women students. The hall continued as a residence for females until 1972, when the first men were admitted.

A further five acres were acquired in 1966 when the Dublin University Botanic Garden was transferred to part of the grounds of Trinity Hall.

By the 21st century, there was a focus on housing first year undergraduates, with a smaller number of places set aside for second year students and postgraduates. In 2004 a €95 million project to hugely increase the number of bedspaces at Trinity Hall opened to students. This allowed Trinity Hall to accommodate over 1,000 students, rather than the 180 it had up until then.

As of 2024, the College has received permission from An Bord Pleanála for a major new development which is scheduled to add over 300 new spaces for students amidst Ireland's ongoing housing crisis.