This walled enclosure, on the eastern side of Masjid-e-Nabwi, is the region where the Prophet (ﷺ) used to lead Salat-ul-Janaza and the Sahaba continued this tradition.
This window, in the Qibla wall opposite the Rawdah Mubarak is where the door of the house of Abdullah bin Umar (رضي الله عنه) was situated. Abdullah bin Umar (رضي الله عنه) was the son of the Caliph Umar bin Khattab (رضي الله عنه).