The Arch Building (Irish: Foirgneamh Áirse), previously known as Cobh Town Hall and before that as Queenstown Town Hall (Irish: Halla an Bhaile An Cóbh), is a municipal building in Casement Square, Cobh, County Cork, Ireland.

The enlarged building was designed by Alexander Deane in the neoclassical style, built in brick with a cement render finish and with grey limestone dressings, and was officially opened on 27 May 1852.

[6] After the Cunard passenger liner RMS Lusitania was sunk by a German U-boat off the Old Head of Kinsale, while en route from the US to Liverpool on 7 May 1915, local fishermen collected the bodies of the victims from the beach and laid them out in the assembly hall.

[9] A statue, intended to commemorate the victims of the Lusitania disaster, was sculpted by Jerome Connor in the form of an Angel of Peace standing above two fishermen and was unveiled in front of the building in Casement Square in 1968.

[13] A significant programme of repair works, to restore the main frontage of the building, was undertaken in 2012.