her by Sigismund Augustus, was covered with black vitreous enamel and had three stones – brilliant, ruby, and emerald). These and other artifacts were kept at Vilnius Cathedral, but they disappeared during World War II. Her skeleton was cleaned, conserved, and glued together by Michał Reicher and Witold Sylwanowicz, professors at Stefan Batory University. They calculated her height at , which was rather tall for her times. Her teeth were white and straight; her body was slim; her face and nose were narrow. They also noted anatomical abnormalities – a cervical (extra) rib and particularly flat sacrum, which could indicate rickets, but the rest of her skeleton showed no signs of the disease. However, they were unable to complete their monograph on the subject due to World War II. Barbara's remains were moved to a crypt under the Chapel of Saint Casimir and remained untouched until 2001. Her height was recalculated at . Using methods developed by Mikhail Mikhaylovich Gerasimov, Vytautas Urbanavičius reconstructed her facial features and revealed that she had an aquiline nose, a feature absent from her portraits. Personal correspondence In total, there are 53 surviving letters from Barbara. 44 of them were published by Alexander Przezdziecki in Jagiellonki polskie x XVI wieku (1868). They are addressed to her family (41 letters to her brother Mikołaj "the Red" Radziwiłł, two letters to her nephews, one letter to her father Jerzy Radziwiłł, one letter to her mother Barbara Kolanka), her husband (8 letters), and Albert, Duke of Prussia (one letter in Latin). It is known that she wrote many more letters to a wider circle of recipients, including Polish nobles and Isabella Jagiellon of Hungary. The surviving letters do not represent actual number or frequency: Sigismund Augustus in his last will asked his sister Anna Jagiellon to destroy his personal correspondence, while Mikołaj "the Red" Radziwiłł was particularly careful to preserve all his correspondence. 52 letters are in Polish (15 of them written by Barbara herself; the rest were written by her secretary Stanisław Koszutski). Her eight letters to Sigismund Augustus, all written between November 1547 and March 1548 from Dubingiai, are the only surviving love letters of the period. However, they are formulaic and use flowery language. Above all, her letters show her humility and subservience to her husband. Barbara habitually refers to herself as his most humble and smallest servant. She inquires about his health, thanks him