Praying in the house of the mourner is completed to be able to reveal regard with the grieving unique along with the deceased. Even as early as 1790, the "Hebra Maarib beZemanah Oheb Shalom" (חברה מעריב בזמנה אוהב שלום) Corporation was Started so as to provide mourners observing shiva https://www.youtube.com/watch?v=9jkGrywMWdQ