The renovation of the Salt Lake Temple, which took place from late 2019 to 2025, focused on several key areas to preserve its historic significance while upgrading its safety and functionality. Here are the details:

Floors and Spaces Renovated (2019–2025):

• Sacred Interior Floors: The main interior spaces—including the celestial room, sealing rooms, and assembly halls—were carefully restored. Original murals, stained-glass windows, ornate woodwork, and fixtures from 1893 were preserved, cleaned, repaired, and reinstalled to retain their historic beauty.
• Mezzanine Levels & Corridors: These connecting and support areas received upgrades, including improved lighting, fire safety, and accessibility, all while maintaining their historical architectural features.
• Underground Levels & Expansion Spaces: The renovation added new underground chambers, including the new second baptistry and additional sealing rooms (expanding from 13 to 22). These new spaces were constructed beneath the existing structure to support increased capacity.
• Roof and Spires: Reinforcement and repairs were done on the roof and the iconic spires, though not on floors per se, to ensure seismic resilience while maintaining the exterior’s historic appearance.

What Was Preserved:

• Original murals and religious artwork (documented, carefully removed for preservation, and reinstalled later).
• Architectural details such as stained-glass windows, ornamental woodwork, moldings, and fixtures originally installed in 1893.
• Key decorative features like the cast-iron oxen at the baptismal font, elegant stone staircases, and historic finishing details.
• Overall interior finishes that reflect the Victorian-era craftsmanship and design.

What Was Removed (and not intended to return):

• Murals and artwork temporarily removed during structural seismic work, slated for restoration and reinstallation.
• Outdated mechanical, electrical, and plumbing systems replaced with modern, high-efficiency systems.
• Certain non-historic or incompatible interior fixtures or finishes that conflicted with preservation standards.

Summary:
The renovation focused on restoring and preserving the temple’s most sacred and historic elements—particularly murals, stained glass, and woodwork—while updating structural systems for safety and capacity. The murals and artwork were temporarily removed during construction but are intended to be reinstalled, ensuring the temple’s historic integrity remains intact for future generations.