Aloysius Pendergast owns the Beaux Arts mansion at 891 Riverside Drive, between 137th and 138th streets. From the outside, the mansion appears to be well-maintained but unoccupied, an appearance carefully preserved by its current and former owner, both of whom value privacy. The mansion was originally owned by Pendergast's great-great-uncle Antoine Leng Pendergast, alias Enoch Leng. Leng acquired the mansion, originally an abbey, in the late 19th century after he was expelled from the in Louisiana.