<unk> <unk> <unk> <unk> <unk>  Passage: The initially wooden barracks was designed by Krikor Balyan. It was burned down in 1806 by revolting Janissaries, who were against the reforms. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ During the reign of Sultan Abdülmecid I, the barracks were renovated twice, first in 1842<unk>43 and again in 1849<unk>50. During this process, a tower seven stories in height was added to each of the four corners, giving the barracks the look they have today.<unk> During this process, a tower seven stories in height was added to each of the four corners, giving the barracks the look they have today.  Question: When did the wooden barracks get rebuilt into stone start?
<unk> <unk> <unk>