The euro held above parity with the dollar on the first trading day of the new week, German financial information sites reported.
The single currency was trading at $1.0085 in interbank foreign exchange trading in Frankfurt today.
The European Central Bank set a reference rate of $1.0049 per euro on Friday.
The euro crossed the $1 mark
The euro has been boosted recently by the ECB's more aggressive monetary policy, which last week raised its key interest rates by 0.75 percentage points in a bid to tackle inflation.
In doing so, the institution followed the other major global banks, which raised rates significantly more aggressively.