Why is it important in Egypt?
The Brotherhood is the oldest and largest opposition group in Egypt. However, it is illegal under Egyptian law, which bans all parties based on religion. Because of this, its members contest elections as independents.
Until last year's polls, the party had 88 seats in the country's legislature. But following a decision to boycott the election because of voting irregularities, its parliamentary influence was wiped out.
The Brotherhood has widespread support among Egypt's middle classes, and its members control many of the country's professional organizations.