Masjid Al Nabawi is wealthy in many historical signs which contain Islamic inscriptions, that show the beautiful side of the Islamic construction. one of those historical markers is Khokhat Abu Bakr Al-Siddiq (may Allah be pleased with him).
Khawkhat is a small door that looks like a large window which is between two houses. Furthermore, it is located between the house of Abu Bakr (R.A) and the Prophet's Mosque -precisely in the west after the last pillar of the old Mosque boundary-.
In Masjid An Nabawi there were three Kawkhas, Khawkhat of Ali ibn Abi Talib, Khawkhat of Khattabs, and Khawkhat Abu Bakr Al Siddiq (may Allah be pleased with them), which is still open till now. Indeed, the Prophet (ﷺ) has commanded in his sermon before his death in 11 AH that to kept it open. Narrated Abu Sa'id Al-Khudri: Allah's Messenger (ﷺ) sat on the pulpit and said: Allah has given one of His Slaves the choice of receiving the splendor and luxury of the worldly life whatever he likes or accept the good (of the Hereafter) which is with Allah. So he has chosen that good which is with Allah. On that, Abu Bakr (R.A) wept and said to the Messenger of Allah: Our fathers and mothers be sacrificed for you [an Arabic expression which explains love]. We became surprised at this. The people said: Look at this Sheikh [old man]! Allah's Messenger (ﷺ) talks about a Slave of Allah to whom He has given the option to choose either the splendor of this worldly life or the good which is with Allah, while he says: Our fathers and mothers be a sacrificed for you. But it was Allah's Messenger (ﷺ) who had been given an option, and Abu Bakr (R.A) knew Him better than we. Allah's Messenger (ﷺ) added, No doubt, I am indebted to Abu Bakr more than to anybody else regarding both his companionship and his wealth. Furthermore, if I had to take a Khalil from my followers, I would certainly have taken Abu Bakr, but the fraternity of Islam. Sufficient. Let no door (i.e., Khoukha) of the Mosque remain open, except [Khawkhat] Abu Bakr's door.
How not, he is considered as the closest friend to the Prophet (ﷺ). He was His companion in his emigration, And he is the greatest believer of this nation in faith and belief.