A modern secular equivalent would be the entitlement to alimony in the event of divorce. The ketubah amount served as a disincentive for the husband contemplating divorcing his wife: he would need to have the amount in order to be able to pay to his wife. Unless the husband pledged otherwise, the minimum obligation towards a man's virgin bride is 200 silver denaria (), known as the principal (or dower's price), and 100 silver denaria () for a man who married a widow or divorced woman. This was paid in full from a man's property in the event of his divorcing her during her lifetime, or of his pre-deceasing her. This same sum, according to Mishnaic exegete Obadiah Bartenura, who cites Maimonides, is always the weight of the 'Shekel of the Sanctuary' (Tyrian coinage), which for every 200 shekels in Tyrian coinage, only 25 were required to be pledged in a virgin's ketubah, a sum equivalent to 200 provincial silver denaria. Based on the anatomical weight of 25 shekels in Tyrian coinage, the minimum amount vouched in a virgin's ketubah amounted to 504 grams of fine silver. Monies pledged in a woman's ketubah can be written in local currencies, but must have the transactional market-value of the aforementioned weight in silver. Most ketubot also contain an additional liability, known as the "additional jointure" (Heb. = increment), whereby the groom pledges addition money to his bride. In Ashkenazi tradition, the custom is to consolidate these different financial obligations, or pledges, into one single, aggregate sum. In other Jewish communities, the custom was to write out all financial obligations as individual components. Archaeological discoveries The ketubah of Babatha, a 2nd-century woman who lived near the Dead Sea, was discovered in 1960 in the Cave of Letters. Over two hundred ketubot were discovered, among other manuscripts, in the Cairo Geniza. They date between the 6th and 19th centuries and, whilst many consist of plain text, there are examples that use decorative devices such as micrography and illumination to elaborate them. Composition Content The content of the ketubah is in essence a two-way contract that formalizes the various requirements by Halakha (Jewish law) of a Jewish husband vis-à-vis his wife. The Jewish husband takes upon himself in the ketubah the obligation that he will provide to his wife three major things: clothing, food and conjugal relations, and also that he will pay her a