The migration crisis has raised various questions about the functioning of existing European legislation linked with asylum procedures, and the ‘Dublin system’ in particular. The origins of what is known as the Dublin system are linked to the Schengen agreement. The original document, the Dublin Convention, an international agreement signed in Dublin in 1990, established a set of rules clarifying the EU country responsible for examining an asylum application. In 2003 the Convention was replaced by the Dublin Regulation 343/2003 (Dublin II) which further clarified these criteria. The regulation was complemented by the EURODAC legislation. The Dublin II legislation has received some criticism over the years over its application in practice. In 2013, the Dublin II regulation was replaced by Regulation 604/2013 (Dublin III) which intends to further improve and clarify the Dublin system.