A 38-year-old man appeared at a special sitting of a court in the Midlands this evening, charged with 394 sex offences.
The man, who can't be named, arrived at Dublin Airport this morning after being extradited from the US.
He faces charges of sexual abuse, rape, assault causing harm, false imprisonment and harrassment.
The man was charged with 210 counts of sexual abuse, 177 counts of rape, three counts of assault causing harm and single counts of rape, false imprisonment, damage to property and one count of harrassment.
The offences allegedly took place during a six-year period in the 2000s against two minors.
The man faces trial in the Central Criminal Court.
Judge Kevin Kilrane refused his application for bail because of the serious nature of the charges.