Also likely, Astor had noted the rising social profile of the Vanderbilt family, led by Alva and Willie and, viewing them as useful allies in her efforts to keep New York society exclusive, had called formally on the Vanderbilts prior to Alva's lavish ball which Astor herself attended. The Vanderbilts were subsequently invited to Astor's annual ball, a formal acknowledgement of their full acceptance into the upper echelon of New York society. Use of "Mrs. Astor" Until 1887, Lina Astor had been formally known as "Mrs. William Astor", but with Charlotte Augusta Gibbes' death that year, she shortened her formal title to "Mrs. Astor", as she was then the senior Mrs. Astor, the only remaining one in her generation. Charlotte's son, William Waldorf Astor, felt that his own wife, Mary "Mamie" Dahlgren Paul, should be "the Mrs. Astor." With the death of John Jacob Astor III in 1890, William Waldorf Astor had inherited his father's share of the Astor holdings and, titularly, became the head of the Astor family. In his mind, this made Mamie "The Mrs. Astor." However, Mamie was eighteen years younger than Lina and lacked Lina's social power. His further attempts at challenging Lina's preeminence in New York society, however, were thwarted, and he soon moved with his family to England, where he later became a viscount. Waldorf-Astoria Hotel In retaliation for his aunt's intransigence, William Waldorf Astor had his father's house torn down and replaced by the first Waldorf Hotel. The hotel was specifically designed to overshadow Mrs. Astor's mansion, which was right next door, in an attempt to overshadow her status with it. The Waldorf Hotel was thirteen stories tall and was built in the form of a German Renaissance chateau: it thus not only overshadowed Lina, but all other structures in the neighborhood as well. Mrs. Astor famously stated about the hotel, "There's a glorified tavern next door." Until the opulence of the Waldorf Hotel revolutionized how New York socialized publicly, polite society did not gather in public places, especially hotels. Unwilling to live next door to New York's latest sensation and public draw, she and her son, Jack, first contemplated tearing down her house and replacing it with livery stables. Eventually she and Jack tore down their house and erected another hotel at its site, the Astoria, and soon the two hotels merged and became the original Waldorf-Astoria Hotel. Astor consequently built a