Rosenblatt was born in 1504 in Bad Säckingen and raised in Basel.

After Oecolampadius died in 1531, she married his friend Capito (who was also newly widowed) and moved to Strasbourg.

Rosenblatt's friend Elisabeth Bucer also died in the same plague, but before she died asked her widowed friend to marry her own husband.

[1] Rosenblatt married Bucer in 1542, and had two children with him (they did not survive to adulthood).

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