His grave in Hietaniemi cemetery in Helsinki has his Arabic name engraved over it with Arabic letters .
Many people believe Wallin converted to Islam , but there is no proof to support that claim at least according to his diaries and letters .
Wallin 's grave in Hietaniemi cemetery in Helsinki has his Arabic name engraved over it with Arabic letters .
Many people believe Wallin converted to Islam , but there is no proof to support that claim at least according to his diaries and letters .