218 ARCHITECTURE. 
the Ticino, near Pavia (pl. 60, jig. 17). It is 700 feet long, 70 feet broad, 
and 108 feet high, and has seven Gothic pointed arches, 66 feet wide and 
60 feet high. The covering has several stories. The great mass of the build- 
ing is of brick, the little columns which support in double rows upon each 
side the covered way for pedestrians are of colored, and the bases and capi- 
tals of white marble, of which also the balustrade and other architectonic 
parts are made. Over the arches are arabesques, with gilding upon blue 
ground. 
The covered bridge over the Rialto in Venice ( pl. 60, jig. 1, view ; jig. 2, 
section) was begun in 1560 by Antonio Conte del Ponte, and finished in 
1591 by Dyonis Boldo. It is a master-work. A single flat marble arch, 
90 feet wide and 19 feet high, supports the street of the bridge, which is 
inclosed upon both sides by arcades of marble used as shops. The bridge 
ascends and descends by three marble steps, and hence its peculiar form. 
The curved bridge (Ponte corvo) over the Melfa, near Aquino, was planned 
by Stefano del Piombino. The ground plan forms a sextant. Stefano’s son 
and the Genoese Fra Jocondo completed the work in 1505. It is 600 feet 
long, 42 feet broad, and consists of seven semicircular arches (jig. 16). The 
middle arch has 88 feet span, the last and smallest 70 feet. The pillars 
increase in thickness symmetrically from 10-12 feet, and stand upon a 
common foundation. The bridge is built in a simple and imposing style. 
2. France. The bridge Notre Dame, over the Seine in Paris (jig. 10), 
was built by Fra Jocondo in 1507, after the stone bridge of 1412 had been 
destroyed in 1499. It is 380 feet long, 73 feet broad, and has six semi- 
circular arches averaging 53 feet span. The pillars are 12 feet broad and 
have three-cornered heads. 
The bridge Ste. Jfarze in Paris (fig. 8) was begun in 1613 by Christopher 
Ste. Marie, and completed in 1635. It is an imitation of the beautiful 
bridge of Augustus near Rimini, 335 feet long, 72 feet broad, and it has 
seven semicircular arches of 42-55 feet span. 
The bridge of Wewzlly over the Seine, near Paris (jig. 9), one of the most 
beautiful and imposing of bridges, was begun in 1768 by Perrot, and 
finished in 1774. It is 876 feet long, 45 feet broad, and consists of five 
large, depressed, basket arches, constructed from eleven centres, of 120 feet 
span, and 30 feet high. Each top surface of the arch ends in a flat arch, 
whose union with the basket arch of the bridge vault produces an oblique 
vault (cow’s horn). At the key-stone the arch is 5 feet, and the oval-headed 
piers are only 13 feet broad. 
The bridge of St. Maizence, over the Eure, built by Perronet in 1774-84, 
is 252 feet long and 39 feet broad. It has three very flat arches of 72 feet 
span (jig. 12) and 4 feet 6 inches thick at top. The piers are only 18 feet 
thick. 
The bridge of Gignac, over the Herrault (pl. 60, jig. 7), was begun in 
1777 by Garipuy, and finished in 1793. It is 558 feet long and 80 feet high, 
with three large arches, the middle of which has 150 feet span and is 50 
feet high. The two other arches are semicircles of 77 feet diameter. The 
piers of the bridge are 24 feet broad. 
218 
