This report presents the final results of archaeological monitoring and archaeological excavation undertaken at Parnell Street—Workfronts 10 and 11—between January 2014 and August 2015 in accordance with Licence No. 14E0006. These works were undertaken by Rubicon Heritage Services Ltd for GMC (Ireland) Ltd on behalf of the Railway Procurement Agency (RPA), now Transport Infrastructure Ireland (TII). Archaeological monitoring of excavations for Utilities Works was carried out along the route of the planned Luas Cross City (LCC) light rail system at Parnell Street. During the course of the monitoring programme at Parnell Street a number of archaeological features were uncovered. These were generally 18th to 19th century in date and related to the development of Parnell Street during this period and associated civic infrastructure—drains, watermains and street surfaces. The works also exposed remains relating to the original boundary wall of the Rotunda Hospital (RPS 6419 and RPS 6420; DCC 2016). Cellars were identified at a number of locations along the entire length of the Parnell Street section of the works. These relate to Georgian (c. 1714–1830) buildings from the original layout of the street in the first half of the 18th century when Parnell Street was Great Britain Street, but there is little remaining from this period in the area. Some of the buildings from this period remain relatively unchanged, with cellars still intact. The most unusual features in this category were a series of slate-roofed structures and associated features exposed outside Nos 37–38 O’Connell Street Upper (AIB Bank; RPS 6021) on the Parnell Street side of the building at the junction of O’Connell Street Upper and Parnell Street. These were quite distinctive and are different to the typical brick-vaulted cellars found at all other locations. Their underlying barrel-vaulted crowns would have been similar to that of conventional cellars and they may have fulfilled a similar function. However, the slate-roof dressing applied to these structures does suggest that they would not have been paved over at the time of their construction and that they were visible at or slightly above street level as a garden or lower- ground level design feature. It is possible that these structures relate to the initial urbanisation of this part of Dublin c. 1700 (under the auspices of the Earl of Drogheda). Brooking’s map of 1728 indicates a developed street frontage at this location. It is possible that the cellars and their related buildings were victims of ambitions of the Gardiner Estate and were demolished to facilitate the construction of Sackville Mall in the mid 18th century. The development of civic infrastructure in this part of Dublin is evident from the culverts, drain and stratified street surfaces uncovered. Three timber water pipes uncovered to the east of the Parnell National Monument (RMP DU018-425----; RPS 6020) at the intersection of O’Connell Street Upper and Parnell Street, reflect the water distribution system of the 18th century. Timber pipes were used across the city until 1809 when the change to cast iron piping was mandated by new legislation.