Ireland on Thursday joined a growing number of European nations enforcing country-wide lockdowns amid the growing threat of coronavirus.

As of Thursday night, all schools, colleges, childcare facilities and cultural institutions will be closed — and indoor gatherings of more than 100 people and outdoor ones with more than 500 were also canceled.

“We have not witnessed a pandemic of this nature in living memory,” Prime Minister Leo Varadkar said from Washington, DC, while announcing the sweeping rules, according to the Irish Times.

“This is unchartered territory,” he said, admitting he was asking for “enormous sacrifices.”

“Acting together, as one nation, we can save many lives,” he said, as his nation recorded 43 cases of COVID-19 along with one death.

His announcement came just hours after Denmark became the second country after Italy to enforce a lockdown, having confirmed 514 cases of COVID-19.

All schools — public and private — and daycare facilities will be closed from Monday, and all public servants who do not perform critical functions have been ordered to stay home for the next two weeks.

All indoor cultural institutions, libraries and leisure facilities are also being closed for at least two weeks.

Reports say Norway’s Prime Minister Erna Solberg was also due to announce similar measures for her country at some point Thursday, after the number of confirmed cases there rose to 621.

Experts have also predicted Great Britain will soon be forced into a lockdown — even as it stands as the only European nation left out of President Trump’s travel ban.

With Post wires