An exhibition - which opened to the general public on Saturday and will continue to do so on weekend afternoons - is in the refurbished centre within Dunscore Church near Dumfries, where Jane Haining grew up.
Among the items on display at the centre is her Hero of the Holocaust Medal.
Miss Haining was matron at the Scottish Mission school in Budapest between 1932 and 1944 and became aware of the growing threat the Nazis posed to the Hungarian Jews.
Determined to ensure the school was a place where all children would feel safe, she repeatedly ignored orders from church officials to return to Scotland.
The 47-year-old was eventually arrested by two Gestapo officers in Budapest and taken to Auschwitz-Birkenau, the notorious Nazi death camp in occupied Poland where she died.
The exhibition also focuses on the history of Dunscore Church, which dates back to 1823 and was part-funded by a £106,400 grant from the Heritage Lottery Fund (HLF) and Historic Environment Scotland (HES).
Nearly 200 people attended a re-dedication service at the Church last Sunday.
Rev Jannie du Plessis led the re-dedication service following the refurbishment and said: "We are delighted by the transformation of our church building and pleased to have been able to share this with so many friends at our celebratory service.
"We now have a warm, dry and comfortable worship space that is suitable for all manner of services, whether traditional or less formal."
The project took three years to complete after water damage was discovered around the tower, roof and walls.
Photographs, a video, letters, a copy of Miss Haining's handwritten last will and testament are also among the items on display at the heritage centre.
