Florence, Lady Baker or Florica Maria Sas; Barbara Szász; Maria Freiin von Sass; Barbara Szasz; Barbara Maria Szász; Barbara Maria Szasz (6 August 1841 – 11 March 1916) was a Romanian-born British explorer.
Born in Transylvania (then Kingdom of Hungary), she became an orphan and was sold as a slave to Samuel Baker.
Together they went in search of the source of the River Nile and found Lake Albert.
They journeyed to Samuel Baker's home in England where they were married and she became Lady Baker.
She later returned to Africa with her husband to try and put down the slave trade.