The interior of the church had a major cleaning in 1952 and In 1960, another remodeling plan took place and the parish decided to continue to work with the Hummel family, hiring Charles Hummel's grandson, who was named Charles after his grandfather.
Charles Hummel Jr. also worked on the 1979 restoration, focusing on four main ideas.
He wanted to restore all the stained glass windows that illustrate the stories of the saints, create more seating for the different groups of people who would come to the cathedral for ceremonies, celebrations, and worship, renew the canvas accents and designs in the interior, and bring in tasteful modern lighting fixtures which accented the classic renaissance look but accommodated to the needs of the citizens.
To accomplish such ideas, Hummel had to make some radical changes to the Cathedral's interior.
He also made sure important architectural details were not changed during the remodel.
These details include the decorative gargoyles that metaphorically hold the weight of the church on their backs as a punishment for their sins, and the windows he restored.

To celebrate the church's centennial, Rob Thorton took on the job of remodeling the downstairs chapel.
Not wanting to tread on the shoes of Hummel's original artistry, Thorton worked with him on the project.
He took the plaster off the walls to expose the stone beneath but kept a section of the wood paneling that Hummel added in 1979.
Thorton also added a dome-shaped hole in the ceiling of the chapel.
Thorton not only worked on the chapel in the lower level but on the reception hall as well.
He took out the brown carpeting, exposed the stone on the walls, and created more space.
The baptismal font was redesigned as a pool and the former font was repurposed as an ambry to hold the holy oils.
A reservation altar for the tabernacle was created in the south transept.
The canopy was from the former high altar.
 St John's received an Orchid Award in 1981 from the Idaho Historic Preservation Council for outstanding work in restoration.
The interior of the church had a major cleaning in 1952 and In 1960, another remodeling plan took place and the parish decided to continue to work with the Hummel family, hiring Charles Hummel's grandson, who was named Charles after his grandfather. Charles Hummel Jr. also worked on the 1979 restoration, focusing on four main ideas. He wanted to restore all the stained glass windows that illustrate the stories of the saints, create more seating for the different groups of people who would come to the cathedral for ceremonies, celebrations, and worship, renew the canvas accents and designs in the interior, and bring in tasteful modern lighting fixtures which accented the classic renaissance look but accommodated to the needs of the citizens. To accomplish such ideas, Hummel had to make some radical changes to the Cathedral's interior. He also made sure important architectural details were not changed during the remodel. These details include the decorative gargoyles that metaphorically hold the weight of the church on their backs as a punishment for their sins, and the windows he restored.
To celebrate the church's centennial, Rob Thorton took on the job of remodeling the downstairs chapel. Not wanting to tread on the shoes of Hummel's original artistry, Thorton worked with him on the project. He took the plaster off the walls to expose the stone beneath but kept a section of the wood paneling that Hummel added in 1979. Thorton also added a dome-shaped hole in the ceiling of the chapel. Thorton not only worked on the chapel in the lower level but on the reception hall as well. He took out the brown carpeting, exposed the stone on the walls, and created more space. The baptismal font was redesigned as a pool and the former font was repurposed as an ambry to hold the holy oils. A reservation altar for the tabernacle was created in the south transept. The canopy was from the former high altar.  St John's received an Orchid Award in 1981 from the Idaho Historic Preservation Council for outstanding work in restoration.
Cathedral of St. John the Evangelist (Boise, Idaho)