13 Ghosts was a horror movie released in the 1960.
When an eccentric uncle wills a huge, ramshackle house to Cyrus and his impoverished family, they get the shock of a lifetime. Their new house comes complete with a spooky housekeeper, Elaine, plus a fortune in buried treasure and 12 horrifying ghosts. As the terrified family soon discovers, these haunted ectoplasms include a decapitated man, a wailing lady and a flaming skeleton, who are held captive in the eerie house and must find an unlucky 13th to free them.

Thirteen Ghosts was another horror movie released in 2001.
A family inherits a spectacular old house from an eccentric uncle. There's just one problem: the house seems to have a dangerous agenda all its own. Trapped in their new home by strangely shifting walls, the family encounters powerful and vengeful entities that threaten to annihilate anyone in their path. Soon the family is joined by an offbeat ghost hunter who is determined to free the spirits imprisoned in the house. Caught in a frantic race to save themselves before it's too late, the human inhabitants realize the house is a riddle which contains the key to their imminent salvation - or destruction.

13 Ghosts was a movie release from Columbia TriStar Motion Picture Group directed by William Castle, while Thirteen Ghosts was a Warner Bros. Pictures Distribution directed by Steve Beck.