World powers and Iran have formally announced a comprehensive nuclear accord.
Federica Mogherini, the European Union's foreign policy chief, said: "Today is an historic day."
She added that it was a great honour "for us to announce that we have reached an agreement on the Iranian nuclear issue".
Negotiators have reached an agreement on Iran's nuclear programme that will limit Tehran's ability to develop nuclear weapons in return for the lifting of sanctions.
The deal was announced in Vienna by Federica Mogherini, the EU's foreign policy chief, and Mohammad Javad Zarif, the Iranian foreign minister.
It ends 20 months of negotiations between Iran and six world power.
While the deal was welcomed by its negotiators, Israel's prime minister was quick to call it "a bad mistake of historic proportions".
Prime minister Netanyahu has likened the nuclear deal with Iran to the unsuccessful 1994 deal on North Korea's nuclear programme.
An end to Iranian nuclear question could soon be a reality after years of hard and often tense negotiations.