room. A putting green was added in 1989 and a swimming pool, hot tub, and pool house in 1991 – all paid for by private donations. A skylit exercise room was added to the rooftop around that time, and numerous security enhancements were also performed. The Navy, responsible for upkeep on the residence, decided in 1991 that Congress would never build a permanent vice president's residence (ostensibly next door to Admiral's House) and opted instead to remodel and repair the house substantially. Al Gore agreed to delay his move into the house by nearly six months in 1993 to allow for the largest renovation of the house since 1974. The $1.6 million repair job replaced the heating, air conditioning and plumbing, removed asbestos, rewired the electrical, replaced the ventilation systems, restored the porch, and upgraded the family quarters on the second floor. In 1991, during the tenure of Vice President Dan Quayle, a non-profit organization, the Vice President's Residence Foundation, was founded to raise funds to redecorate the residency. Quayle also added an exercise room and a pool to the house. Vice President Mike Pence and Second Lady Karen Pence made few changes to the residence, besides the Second Lady's addition of a beehive to the grounds in 2017. Vice President Kamala Harris and Second Gentleman Douglas Emhoff moved into Number One Observatory on April 7, 2021. They temporarily resided at Blair House during the renovations as they agreed to move in once the $3.8 million upgrades to the residence had been completed. The repairs consisted of replacing chimney liners, heating, air-conditioning, and plumbing systems. Harris was responsible for having the kitchen remodeled and the hardwood floors refurbished. In October 2021, Emhoff affixed a white mezuzah to the right-hand side of the doorway of the residence's wooden entryway, which marked the first time an executive home in American history has carried the abiding sign of sanctity of a Jewish home. On November 28, 2021, Harris and Emhoff became the first second couple to light a menorah in the window of the official residence in celebration of the first night of Hanukkah. On April 15, 2022, Harris and Emhoff became the first known second family to host a Passover Seder at the vice president's residence. Architecture and decoration Queen Anne style The house is built in the Queen Anne style prevalent in the last quarter of the nineteenth century. Hallmarks of