This house situated in Downtown Lima, Peru is the most famous haunted structure in the entire country. It is famous throughout, you can ask anyone in Lima, and they will all know of it whether they believe in paranormal phenomena or not. The house was first brought to my attention when I moved to Peru by one of my maids, she told me all about it and then my mother confirmed the stories circulated, but said they were all made up. During her last visit, I had her recount a couple of versions of the story of the Matusita which she knew (there are dozens):
At the turn of the twentieth century, there lived in the house a cruel man with two servants (cook and butler). During dinner with friends, the servants decided to get their revenge and poison their master and his friends with hallucinogenic substances. They served the tampered dinner and locked the door of the dining room. A few minutes later, the servants heard  a horrible scuffle. They waited until the noises ceased and then when they opened the door, they saw that the diners were torn to pieces, there was blood spread everywhere. The servants felt terribly guilty and took their lives right there. This version is said to explain the loud voices, conversation and laughter followed by blood curling cries and sepulchral silence that neighbors and passerbyers have attributed to the house.  It is said that if they get close to the house or look in, they will go mad at the sights of gore and debauchery inside.
This version shows the rift between the master and his servants which can be extended to the sentiments that the indigenous and African workers feel towards their European (and later on Asian) masters. This tension is found to this very day since in Peru there is a very strong, but passive racist undercurrent that is perpetuated from generation to generation and never confronted. The race of the master is left unsaid in some versions of the story like this one (it is implied he was white); however , there are also versions that connect this version to version b which I also discuss. In those versions, the master is Asian and a descendent of the Chinese family who lived in the house in the 19th century.