Abdel Fattah al-Sisi was sworn in as president yesterday following a landslide election almost a year after he deposed Egypt's first freely elected leader and crushed his Islamist supporters.
The retired field marshal took the oath of office at the heavily guarded Constitutional Court and then left to attend a reception with foreign dignitaries.
Western countries alarmed by the brutal crackdown on dissent following the overthrow of Islamist president Mohamed Morsi last year mostly sent low level representatives.
Sisi scored a lopsided victory last month in an election boycotted by Morsi's Muslim Brotherhood and secular dissidents, also targeted by the army-installed government in the wide-ranging crackdown.
Soldiers and police deployed in force in the capital in anticipation of protests by the battered Brotherhood movement and possible militant attacks.
"I swear by almighty God to preserve the republican system, and to respect the constitution and the law and to care for the interests of the people; and to preserve the independence of the nation and its territorial integrity," Sisi declared in the ceremony broadcast live on television.
The presidency said he would later host a reception at Cairo's Ittihadiya presidential palace, with Palestinian president Mahmud Abbas, Arab royals and African leaders in attendance.
Sisi will also sign a transfer of power agreement with Adly Mansour, a chief justice whom Sisi had installed as interim president when he ousted Morsi on July 3.
Riding a wave of popularity since then, Sisi won the May 26-28 election with 96.9 percent of the vote against his only rival, leftist leader Hamdeen Sabbahi.
The nature of the victory showed he still enjoyed immense support for his overthrow of the divisive Morsi, after millions held protests demanding an end to the Islamist's single year of turbulent rule.
But the lower than anticipated turnout of about 47 percent denied Sisi the overwhelming mandate he had called for ahead of the vote.
Sisi's main challenges will be to restore stability and revive the economy after three years of turmoil, following a 2011 uprising that ousted strongman Hosni Mubarak.