Merz, a Jenkintown native and author of books about Philly heroes Ryan Howard and racehorse Smarty Jones, learned of Tharpes unmarked grave last year while listening to an interview with Gayle Wald, who recently wrote a book about Tharpes life.
Appalled that Tharpes legacy in Philadelphia, where she lived for the final 16 years of her life, has been so under-appreciated, Merz contacted Wald to learn more about her gravesite.
Wald told Merz that others who were similarly shocked to learn of the unmarked grave in West Oak Lane had sent donations, but the money wasnt sufficient for a marker.
Thats when Merz decided to put together a concert it will be presented on Friday night at the Keswick Theatre in Glenside to raise the funds that will finally place a proper memorial at Rosetta Tharpes gravesite.
The performance itself is likely to be one for the history books. On the bill are The Dixie Hummingbirds and Marie Knight, both legendary gospel acts in their own right who joined Tharpe on her groundbreaking tours during the 1940s.
Also appearing on the Keswick stage is Odetta, who was hailed as "the queen of American folk music" by Martin Luther King Jr. in 1961.
Other gospel artists paying tribute to Tharpe will be the Johnny Thompson singers, the Huff Singers and Willa Ward.
"These performers are pioneers of American music, and they are as important as they are forgotten," says David April, a Fishtown resident who hosts a weekly gospel show on Radio Delaware Valley 107.3 FM (as well as 107.9 FM in Bensalem). "This is going to be one of the last chances to see them all perform together, so it really is a historic concert."
Except for Odetta and Marie Knight, all the performers on Friday nights lineup have deep Philadelphia roots, a testament to the citys rich gospel history.
"Philadelphia was and still is a major gospel city," said April, who featured The Dixie Hummingbirds as guests on his Tuesday night show. "A lot of African-Americans came up here from the South in the thirties, and in that way gospel has the same history as jazz and blues."
It was that vibrant scene that brought Tharpe to Philadelphia in 1957. She first set up at the Carlyle Hotel on Poplar Street and later did sold-out shows at the nearby Metropolitan Opera House, along with The Dixie Hummingbirds, while continuing to tour in the U.S. and Europe.
Today, Poplar is also designated as Dixie Hummingbird Way between Broad and 21st streets in honor of the gospel greats.
In her final years, Tharpe had a dire case of diabetes, an illness that eventually required the amputation of a leg. During that time she lived with her third husband, Russell Morrison, at 11th and Master streets in the Yorktown section and continued to perform.
Exactly how Rosetta Tharpe ended up in an unmarked grave is a point of contention, but friends say that Morrison, who is deceased, managed Tharpes profits poorly and that he either didnt have money for a headstone or wouldnt pay the expense.
Roxie Moore, 91, a longtime friend of Tharpes who recalled her funeral at the Bright Hope Baptist Church in North Philadelphia as "peaceful and quiet," put the blame for the unmarked grave on Morrison.
"With Russell, it was always like you had to do something to see Rosetta," said Moore. "He sure was something. He was always the guy in charge."
Tharpe, Moore explained, had an innocent and easygoing outlook that made her a vulnerable target for opportunistic people.
On the stage, though, Tharpe was a figure larger than life, Moore added. The two had met in Baltimore in the summer of 1937, when Tharpe was still touring on gospel tent circuits.
"She would have crowds of people standing all around, and she was really quite dynamic," recalled Moore. "She would have some people shouting, and some people crying."
It was the first time Moore saw a woman play a guitar. She says she hasnt seen a guitar played quite like that since.
Another woman who recalls a similar life-changing meeting with Tharpe is Marie Knight, who will perform in honor of her old friend during the Keswick concert. As a young and not-yet-professional gospel singer, she met Tharpe after the musician left a note at her church.
Within a few weeks, at age 19, Knight left her home in Newark, N.J., to tour with Tharpe. The duo soon became one of the hottest acts in poplar music, with a string of big hits on the Decca label in the late 1940s.
"We had a saint-and-sinner act," Knight explained. "It worked beautiful. I had an old guitar, and she would play a song down to a certain point, and she would call me out to finish the song, but I only had one string on the guitar.
"Then I would go off the stage, and when I would come back out, the audience would be going wild, going real crazy, and then we would do the duet together the way it was supposed to be."
Knight said Tharpe stood out against other musicians of the time because of her incredible combination of smoking rhythm guitar and stunning vocals.
"She was a musician, and the way she played that guitar and sang, well, there was really no one around who was as famous as she was for that," said Knight, who performed a final song for Tharpe, Let Jesus Fix It For You, at her funeral.
Odetta, who came into the spotlight just as attention was beginning to turn from gospel and jazz to folk and rock n roll, said that the trailblazing Tharpe enabled her and others to take the stage in the 1960s.
"She is a part of that history that was so valuable and is so valuable to young blacks as we were coming along," said Odetta. "She is certainly a champion where the guitar is concerned. My playing was a fair rhythm guitar, but that woman could play the guitar."
Knight, Merz and Odetta agree that Tharpes story of being treated unfairly by history is painfully commonplace.
"Its been many a year ago since Rosetta died, and why they want to put a marker there after all this time, I dont know. Its been a long time," said Knight. "She was a famous artist."
"Unfortunately, her story is not that uncommon," said Merz. "A lot of these musicians didnt make a lot of money or get credit for their contributions, and ended up getting hosed over in one way or another."
The Keswick Theatre concert, he said, could be just the beginning of unearthing and honoring Tharpes legacy in Philadelphia.
Just last week, Gov. Ed Rendell, whom Merz called "a big gospel buff," declared Jan. 11 as "Sister Rosetta Tharpe Day."
Any concert proceeds that remain after purchase of the headstone for Tharpes grave will be contributed to music scholarship programs at Temple University and the Settlement Music School.
Merz also recently filed for a historical marker to be erected at Tharpes former home on Master Street.
"This really is about a lot more than just getting a headstone out there for Rosetta," said Merz. "Its about uplifting some of these North Philadelphia neighborhoods. Philly is always looking for some winning sports team or a hero to put up on pedestal, and yet we have something like this right in our back yard and nobody even knows about it.
"Even if just one kid was to walk by her house or memorial and be inspired because they knew that such a great musician lived in their neighborhood, that would mean so much."
Some key details . . .
The Sister Rosetta Tharpe Benefit Concert takes place at the Keswick Theatre, 291 Keswick Ave. in Glenside, on Jan. 11 at 8 p.m. Performers include The Dixie Hummingbirds, Marie Knight, Odetta, the Johnny Thompson Singers with Willa Ward, and The Huff Singers.
For more information and tickets, call 215-572-7650.
For further reading, check out Shout Sister, Shout! The Untold Story of Rock n Roll Legend Sister Rosetta Tharpe, by Gayle Wald (2007), as well as Great God AMighty - The Dixie Hummingbirds: Celebrating the Rise of Soul Gospel Music, by Jerry Zolten (2002).
You can see Rosetta Tharpe in action on the Internet by visiting www.youtube.com/watch?v=JeaBNAXfHfQ