People are being told not to leave their homes for the next 2 weeks - except for a small number of circumstances.
They are to buy food or household goods, go to medical appointments or essential work and for vital family reasons.
Brief exercise is also allowed within 2 kilometres of someone's home.
People over 70 are also being told to "cocoon" themselves by staying indoors.
The measures are in place until Easter Sunday as part of government efforts to tackle Covid 19.
Taoiseach Leo Varadkar doesn't believe there are many more restrictions that could be put in place in the future.