The love Thomas “Mas” Giansante feels for the worn and soon-to-be-vacated Sutter Hospital building — previously home to Community Hospital and, originally, to Sonoma County Hospital — is not the love of a plant engineer.

Giansante knows and maintains and appreciates the boilers and the pipes and wiring and bones of the structure on Chanate Road, the heart of which dates to the mid-1930s. But it’s the artist within the hospital’s assistant chief engineer that connects most potently with the bronze-doored old beauty.

A Sutter employee the past eight years, Giansante recalled, “As soon as I walked through those doors I thought, ‘I love this building.’ Little did I know I’d be painting it so much. It became my favorite muse.”

By “painting it,” he does not mean applying fresh colors to the walls, but creating a series of affectionate and vivid canvases that portray some of the many aspects of the hospital on the hill that intrigue him.

Giansante, 61, has become a student of the craftsmanship that went into the construction of Sonoma County Hospital, dedicated in Depression-stressed 1937.

“You can tell there was a lot of civic pride that the county had its own hospital,” he said. He regards the long ground-floor hallway a boulevard of visual delights, and he finds that all through the day, the building produces great shadows and transitions of color and shade.

He’s thrilled that Sutter purchased one of his larger renditions of the old building for permanent exhibit at the new hospital to open in October alongside the Wells Fargo Center for the Arts, just north of Santa Rosa. The piece is a 90-inch by 50-inch, orange-hued portrait of the main building, with its doors of glass and bronze.

Sutter could have opted to leave the walls of the new hospital bare, or to adorn them with institutional art prints. Instead, officials incorporated into the construction budget the cost of about 360 pieces of original, local art.

An array of artists responded to an invitation to submit proposals for submissions to what will be one of the largest collections of Sonoma County art ever assembled and placed on permanent, public display. Among the pieces are a great mural of poppies that brightens the hospital’s bistro and an elaborate portrayal of a flying stork in the labor-and-delivery unit.

A glass wall honoring donors to the new medical center stands 11 feet high and is backed by a map of the Russian River region.

Sutter spokeswoman Lisa Amador said Giansante’s painting is a centerpiece of the collection.

“It’s really bringing our history from the Chanate campus over to the new campus,” she said.

Giansante, a native of upstate New York who settled in California in 1976, said he’s always been an artist inspired by his surroundings. His paintings — in oils, acrylics and water color — chronicle his travels and the places he has lived and worked.

“Wherever I work, I end up seeing things I want to paint,” he said. “Especially shadows. I love them.” One of his series evokes scenes he viewed from the top floors of Santa Rosa parking garages.

For a time, Giansante painted full time. He showed and promoted his art and that of other artists in exhibits he’d open and run for a few days in vacant buildings in and around Santa Rosa. The Italian-American called his fleeting shows Pirata de La Strada: Hit and run.

He said the hand-to-mouth nature of getting by as a professional artist prompted him to take a job years ago as a building engineer at the Macy’s at Coddingtown Mall. He’d never been to the Sutter Hospital on Chanate Road when he applied for work there nearly nine years ago and instantly became enamored with the edifice and its character and shadows.

“It just felt like, wow, this place feels right.”

For the piece now hanging in the new hospital, he considered including people, but decided to go just with the classic architecture and golden light. He said, “Once you put a person in it, people start to think, ‘Oh, what is that person doing?’”

His painting will serve to evoke memories of the long-revered County Hospital and Community Hospital, and of Sutter Hospital 1996-2014. Presumably, the Chanate campus will be demolished one day, and the painting will become all the more dear.

The engineer in Giansante is ready for the Oct. 25 move to the new hospital. At the old one on the hill, he said, every new day brings the question, “What’s going to break down today?”

But the artist in him will be sorry to push on the heavy, bronze doors and walk out of the historic hospital for the last time.

“I’ve been saying good-bye to it,” he said.

Chris Smith is at 521-5211 and chris.smith@ pressdemocrat.com.