Placing a Wreath on a Grave
Question:
Is placing a wreath on the grave of the 'Unknown Soldier' equal to aggrandizing the dead Awliya' and pious people to the point of worshipping them?
Answer:
This practice is an innovation, and excess in terms of revering the dead, and it is similar to the practice of those who over-revere pious people. It is feared that this practice may lead to building domes above their graves, seeking their blessings, and taking them for gods beside Allāh, Glorious is He. This practice should be stopped lest it lead to Shirk. May Allah exalt the mention of our Prophet Muhammad, his household, and Companions and render them safe from evil.
Source:
Fatawa Islamiyah, Vol. 1 Pages 29