The Irish House of Lords, also known as the Lords Spiritual and Temporal, was the upper house of the Parliament of Ireland from its establishment in the 13th century until its dissolution in 1800. It consisted of bishops and hereditary peers who played a significant role in the legislative process, reviewing and amending bills proposed by the lower house, the House of Commons. The Irish House of Lords was abolished following the Act of Union 1800, which merged the Parliament of Ireland with the Parliament of Great Britain to form the Parliament of the United Kingdom. This change aimed to create a more unified legislative body, but it also marked the end of Ireland's independent parliamentary system.