1193



Plan and elevation of the Tower de' Conti at Rome in the thirteenth centnry, by Marchionne d'Arezzo, several of whose works are cited by Vasari in his life of Arnolfo di Lapo.
Seroux


Rude kind of opus incertum, from the ancient tower de' Conti at Rome, executed in the twelfth century, composed of fragments of lava and pebbles, thrown in pell-mell with the mortar, and at unequal intervals in height, are layers of mortar to consolidate the work.
Seroux


Portion of the fašade of the Fountain Branda at Sienna, commenced in 1193.
Seroux




Plan and elevation of the Fountain Branda at Sienna, erected in 1193.
Seroux

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