no heresy should be innovated nor any sin should be committed in it, and whoever innovates in it an heresy or commits sins (bad deeds), then he will incur the curse of God, the angels, and all the people." The Prophet's Mosque (al-Masjid an-Nabawi) According to Islamic tradition, a prayer in The Prophet's Mosque equates to 1,000 prayers in any other mosque except the Masjid al-Haram where one prayer equates to 100,000 prayers in any other mosque. The mosque was initially just an open space for prayer with a raised and covered minbar (pulpit) built within seven months and was located beside Muhammad's rawdhah (residence, although the word literally means garden) to its side along with the houses of his wives. The mosque was expanded several times throughout history, with many of its internal features developed over time to suit contemporary standards. The modern Prophet's Mosque is famed for the Green Dome situated directly above Muhammad's rawdhah, which currently serves as the burial site for Muhammad, Abu Bakr al-Siddiq and Umar ibn al-Khattab and is used in road signage along with its signature minaret as an icon for Medina itself. The entire piazza of the mosque is shaded from the sun by 250 membrane umbrellas. Quba'a Mosque It is Sunnah to perform prayer at the Quba'a Mosque. According to a hadith, Sahl ibn Hunayf reported that Muhammad said, "Whoever purifies himself in his house, then comes to the mosque of Quba' and prays in it, he will have a reward like the Umrah pilgrimage." and in another narration,"Whoever goes out until he comes to this mosque – meaning the Mosque of Quba' – and prays there, that will be equivalent to 'Umrah."It has been recorded by al-Bukhari and Muslim that Muhammad used to go to Quba'a every Saturday to offer two rak'ahs of Sunnah prayer. The mosque at Quba'a was built by Muhammad himself upon his arrival to the old city of Medina. Quba'a and the mosque has been referred in the Qur'an indirectly in Surah At-Tawbah, verse 108. Other sites Masjid al-Qiblatayn Masjid al-Qiblatayn is another mosque historically important to Muslims. Muslims believe that Muhammad was commanded to change his direction of prayer (qibla) from praying toward Jerusalem to praying toward the Ka'bah at Mecca, as he was commanded in Surah Al-Baqarah, verses 143 and 144. The mosque is currently being expanded to be able to hold more than