The Casa Loredan is at San Marco 4137, and, though often restored, it provides for Ruskin evidence for Byzantine style, so long as one forgets the Renaissance additions in the upper part.
In the published text see:
Plate 8 facing Works, 4.300 [n/a] for an image made by Ruskin in 1845.
Works, 10.146 and Works, 10.149 on its front arcade in relation to the other Byzantine houses identified by Ruskin.
Works, 10.157 on concave capitals of small shafts at the flank.
Works, 10.159f and numbers 4,5,7 and 11 of Plate 8 facing Works, 10.158
In the Notebooks see:
House Book 2 p.50 on bead moulding, bases and dentils.
Notebook M p.133L two very ancient shafts of veined marble at the back of the Casa Loredan
Notebook M p.140L for measurements, and compare House Book 2 p.51L for what appears to be the first version of them;
Notebook M p.140 Casa Loredan is much earlier than Fondaco dei Turchi: or very bad work
Notebook M p.192 heart shaped wreath occurs characteristically at Casa Loredan
Notebook M2 p.3 on circle mouldings
Notebook M2 p.32 for Ruskin’s evidence for its date from Zanotto (1847) p.420.
[Version 0.05: May 2008]