The Arnotts Department store on Henry Street opened for business from noon today until 6pm following yesterday's events in Dublin city centre.
A spokesperson said that staff worked through the night to prepare the premises for the reopening this afternoon.
Donald McDonald, the chief executive of Brown Thomas Arnotts, said the retailer was shocked and saddened by the attack of a woman and children at Gaelscoil Coláiste Mhuire in Parnell Square and the subsequent "terrible events" last night in Dublin city centre.
The CEO said the retailer was particularly shocked by the images of Arnotts on social media showing a gang of people breaking into the Abbey Street door shortly after it closed and ransacking limited parts of the store.
"We prioritised customer and team safety and made a timely decision to close the store early yesterday evening. Thankfully nobody was hurt in the events that unfolded at Arnotts and all our team members and customers, while shaken, are safe," the CEO said.
"Arnotts is a very special place, made up of great people and throughout its 180-year history, Arnotts has not alone survived but thrived through tough times, emergencies and many crises," Mr McDonald said.
"Arnotts is Dublin's department store, it is part of Dublin, so shame on those people last night for what they did to our city and our beautiful store," he added.
"They may have damaged our store and stolen some merchandise, but they can never damage the Arnotts spirit, we will not allow them. Our teams have worked through the night to repair our store. We will fix what needs to be fixed and open our doors, later than normal, but with the same pride as we always have at Arnotts when serving our customers," he said.
"ight now our paramount concern is for our team's welfare and safety and we thank them for their professionalism and resilience during the disturbance last night," he added.
Mr McDonald said that Arnotts wll engage with the relevant authorities and the Gardaí to understand what actions they are taking to ensure nothing like this happens again in Dublin City, or anywhere it has stores.
Meanwhile, An Post also said the GPO on O'Connell Street reopened for all business at 12 noon today.
It said its later than usual opening would allow time for the clean-up operation in the city centre and the resumption of public transport for customers and staff.