Construction of the John Hancock Tower, which began in the summer of 1968 in Boston’s Back Bay neighborhood, was marked by a series of significant challenges that delayed its completion and raised concerns about structural safety. Intended to rival the nearby Prudential Center, the skyscraper was designed as a sleek, nearly 800-foot glass rhomboid, but early stages of its development quickly revealed unforeseen problems.

During initial excavation, workers inadvertently damaged utility lines and caused harm to adjacent structures, notably the historic Trinity Church located near the site. As the tower rose, it became apparent that its architectural design introduced new engineering difficulties. The building exhibited pronounced movements in ordinary wind conditions, described by engineers as a "cobra’s dance," causing unsettling swaying and twisting. This instability not only alarmed the engineers responsible for the project but also uneasy occupants who reported discomfort due to the motions.

Perhaps the most infamous issue arose when the tower’s glass facade began failing. Large windows unexpectedly detached and fell to the ground, prompting safety concerns and necessitating the installation of temporary plywood panels over the vacant window spaces. This led the building to earn the unflattering nickname "plywood palace." The removal and replacement of the defective windows became a major logistical and financial undertaking, further complicating the project’s timeline.

Despite these setbacks, the John Hancock Tower eventually emerged as an architectural landmark, celebrated for its minimalist design and reflective glass surface that mirrors the Boston skyline. However, its construction history serves as a cautionary tale in modern engineering, illustrating the complex interplay between innovative architectural vision and practical structural demands.