The abolition of Parliament in 1800 had a major economic impact. Within a decade, many of the finest mansions (including Leinster House, Powerscourt House, and Aldborough House) had been sold, often to government agencies. Though Parliament itself was based on the exclusion of the vast Irish Catholic majority in Ireland, many nationalist historians and writers blamed the absence of Parliament for Dublin's increased impoverishment, with many of the large mansions in areas like Henrietta Street sold to property developers and landlords who reduced them to tenements.