Bruckner wrote nine numbered symphonies, the last of which was
left unfinished at his death. He wrote two additional symphonies,
the first in F Minor was a study symphony written in 1863 as an
assignment by his composition teacher, Otto Kizler. In addition,
after he completed his first numbered symphony in 1866, he composed
another symphony in D Minor in 1869 which was not well received. As
a result, Bruckner withdrew it and gave called it his Nullte
Symphony or Symphony #0.