Another annual highlight is the two-week O-Mizu-tori Festival at Nara's Nigatsudo Temple, one of Todaiji's subtemples.
There are no festivals held at the Nigatsudo Temple. 
mnli hypothesis: There are no festivals held at the Nigatsudo Temple.  premise: Another annual highlight is the two-week O-Mizu-tori Festival at Nara's Nigatsudo Temple, one of Todaiji's subtemples.