The ceremony took place at Lambarene 230 kilometres (140 miles) south of the capital Libreville in the family cemetery of the Albert Schweitzer hospital, one of those present said.
Christiane Engel, one of Schweitzer-Miller's three daughters, made the journey from the United States.
Government ministers and staff from the hospital were also among the hundreds present, as were patients at the leprosy hospital which Schweitzer created.
The urn was placed in the same grave as that containing the ashes of Schweitzer-Miller's second husband, US doctor David Miller.
She had asked that her grave should be on the banks of the river Ogooue, next to those of Scwheitzer, who won the Nobel peace prize in 1952, and his wife Helene Schweitzer-Bresslau.
Rhena Schweitzer-Miller, who trained as a laboratory technician, helped her father at the Lambarene hospital and took over as its head when her father died in 1965. Besides her three daughters she had a son.
Albert Schweitzer was born in Alsace, then part of Germany, now part of France, and was a theologian and accomplished organist who became a medical missionary.
He founded a hospital in what is now Gabon in 1913, was interned during the First World War, returned to Lambarene in 1924 and except for relatively short periods spent the rest of his life there.
With the funds earned from his book royalties and personal appearance fees and with those donated from all parts of the world, he expanded the hospital to 70 buildings which by the early 1960s could take care of over 500 patients in residence at any one time.
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Christiane Engel, one of Schweitzer-Miller's three daughters, made the journey from the United States.
Government ministers and staff from the hospital were also among the hundreds present, as were patients at the leprosy hospital which Schweitzer created.
The urn was placed in the same grave as that containing the ashes of Schweitzer-Miller's second husband, US doctor David Miller.
She had asked that her grave should be on the banks of the river Ogooue, next to those of Scwheitzer, who won the Nobel peace prize in 1952, and his wife Helene Schweitzer-Bresslau.
Rhena Schweitzer-Miller, who trained as a laboratory technician, helped her father at the Lambarene hospital and took over as its head when her father died in 1965. Besides her three daughters she had a son.
Albert Schweitzer was born in Alsace, then part of Germany, now part of France, and was a theologian and accomplished organist who became a medical missionary.
He founded a hospital in what is now Gabon in 1913, was interned during the First World War, returned to Lambarene in 1924 and except for relatively short periods spent the rest of his life there.
With the funds earned from his book royalties and personal appearance fees and with those donated from all parts of the world, he expanded the hospital to 70 buildings which by the early 1960s could take care of over 500 patients in residence at any one time.
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