One of the first—and only—structures the Boldts got to enjoy while Boldt Castle was being built is Alster Tower. Often referred to as the "Children’s Playhouse," this unique building offers a glimpse into the opulent recreational life of the Boldt family during the early 20th century and illustrates George C. Boldt's imaginative vision and love for his family.
Completed in 1899, Alster Tower was completed before the construction of the grand Boldt Castle. George Boldt, the millionaire proprietor of the Waldorf-Astoria Hotel in New York City, envisioned the tower as a space dedicated to leisure and entertainment for his family and guests. Unlike the main castle, which remained unfinished due to the untimely death of Boldt's wife, Louise, the family actively used Alster Tower during their summers on Heart Island.
Alster Tower's design is a departure from conventional architecture created to reflect the charm of medieval European castles. The structure features slanting and uneven walls, ceilings, and roofs, and the deliberate irregularity adds to its whimsical character, making it the most architecturally unique building on the island.
In Madison’s Mission, Mrs. Boldt rests in the Venetian Room and the Boldts entertain here, too. The Tower’s recreational facilities reflects Boldt's commitment to providing unparalleled entertainment. Its amenities included a two-lane Bowling Alley, Billiard Room, Venetian Room, Library, Shell Room and Theater with a stage for performances and entertainment.
These features made Alster Tower the center for recreation and socialization for the Boldt family and their guests, even before the castle was ready to enjoy.
After years of exposure to the elements and periods of neglect, restoration efforts are working to revitalize Alster Tower. The Thousand Islands Bridge Authority undertook extensive work, including masonry restoration, veranda reconstruction, and interior refurbishments. By 2014, the tower was reopened to the public, allowing visitors to experience its historical and architectural significance firsthand. And the work continues.
Today, Alster Tower stands as a captivating piece of the Boldt Castle estate. Visitors can explore its unique rooms and envision the lively gatherings that once took place within its walls. The tower's distinctive design and rich history offer a fascinating glimpse into the lavish lifestyle of the Gilded Age elite. Whether you're an architecture enthusiast, a history buff, or simply curious, Alster Tower on Heart Island is a destination that promises to enchant and inspire.
ABOUT MADISON’S MISSION:
Step into the captivating world of Boldt Castle in 1903, where dreams are forged in the fires of adversity and love. Madison Murray, maid to Louise Boldt, harbors a singular mission—to care for her ailing mistress while hiding her own painful past. She meets Emmett O’Connor, but just as their relationship grows, tragedy shatters their world, and Madison is ensnared in a dangerous coverup. When Mrs. Boldt passes away, Madison is left reeling, can she move forward? Will Emmett forge a future alongside the woman who has captured his heart?
ABOUT SUSAN:
Susan G Mathis is an international award-winning, multi-published author of stories set in the beautiful Thousand Islands in upstate NY. Susan has been published more than thirty times in full-length novels, novellas, and non-fiction books. She has fourteen in her fiction line. Susan is also a published author of two premarital books, stories in a dozen compilations, and hundreds of published articles. Susan lives in Colorado Springs and enjoys traveling the world. Visit www.SusanGMathis.com/fiction for more.








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