 The reference can be found in the personal archive of the historian Lyubomir Vasilev from Sadovo's neighboring village, Kochevo.The "Bulgarianization" and Christianization of Sadovo began during the 17th century, when in the short register from a tax for Plovdivsko from 1622, there is already evidence that in Sadovo, there were already 9 Christian households.However, up until the end of the 17th century, the village remains predominantly Muslim, even though a large increase in a Bulgarian Christian element can be seen from other documents.