Frances Thurber Seal (1860–1932) was a Christian Science practitioner and teacher from the United States and one of three people to establish the religion in Germany.

Born the daughter of a missionary and a preacher, her father's family was descended from French Huguenots who emigrated to England and later, to the United States.

Afterward, she found herself no longer suffering from a long-standing stomach ailment or the failing vision she had been told would result in early blindness.

[3][6] Seal was one of three people, the other two being native Germans, Bertha Günther-Peterson in Hanover and Hans Eckert in Stuttgart, working as Christian Scientists in Germany in 1897.

After she was accepted, a by-law was published, stipulating that normal class students were to have a minimum of three years' experience in the public practice of Christian Science.

After thinking of this for a time I visited a Christian Science reading room to ask how to begin to gain freedom from fear.

His statement that this thought of itself would be helpful was soon proved to be true, with such startling distinctness that I resolved to study Christian Science earnestly and test it for myself.