dun beal gallimhe can be translated as ""fort at the mouth of the gallimhe river."" it is believed to have been situated on the site of the present customs house. this building is situated in the heart of the old medieval city between quay street to the north, flood street to the south, druid lane to the east and quay lane to the west. subsequent to the founding of galway in 1232, a castle and hall were built upon the site. the latter building was known as the red earl's hall and was excavated in 1999.