The Neolithic Age in Ireland is a period of time that spanned from 4000 to 2500 BC. It was marked by the first permanent settlements, the domestication of animals and plants, and the development of pottery-making technologies. During this era, megalithic structures such as Newgrange were constructed. This monumental site is believed to have been used for religious or ceremonial purposes. Metalworking techniques emerged during this time period, which saw the use of copper and bronze tools become widespread throughout Ireland. The Neolithic Age saw an increase in population density as well as increased levels of trade between different regions of Europe. These changes set the stage for more complex societies and economies in later centuries.