The Lotz family collection includes these large format prints. They were either printed for the 1977 exhibition in Palazzo Strozzi in Florence (in which case they are mounted on green card) or they had a special significance for Hilde.
Note: there is some flare and other light irregularities on some of these images below. It is a result of the way they were reproduced with an iphone and are not on the originals.

Ponte Santa Trinita 60x36cm Florence exhibition

Piazza dei Peruzzi 30x40cm Florence exhibition

Palazzo del Podesta (il Bargello) 30x41cm Florence exhibition No. 15

Ponte Santa Trinita 39x25cm

Ponte Santa Trinita 39x26cm: Reverse: photo: Hilde Lotz-Bauer 1939 on Agfa Brovira

Medieval Wall 30x40cm Mura Medievale Florence exhibition No. 26

Piazza Trinita dei Monti at the top of Spanish Steps 29.5x20cm

Courtyard Palazzo Strozzi 30x40cm

Via San Nicolo 30x40cm Florence exhibition

Chiesa di San Pancrazio et Santa Sepolcro 29x39cm Florence exhibition
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Piazza del duomo con l'abside del duomo 30x39cm Florence exhibition

Badia Fiesolana Interno 30x40cm Florence exhibition

Michelangelo Laurentian Medici library on white backing 30x42cm

Palazzo Strozzi Cortile (this is where Hilde's exhibition was held) and this photo was included 50x60cm

Via de' Bardi 50x59cm Florence exhibition No. 21
See also:
Umberto Baldini, Introduzione alla Architetture Fiorentine 1977
La Nazione, Chiese, palazzi e ponti fotografati con bravura, June 1977
Where Hilde lived, worked and photographed in Florence