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Trezzo Bridge
The Trezzo sull'Adda Bridge or Trezzo Bridge was a medieval bridge at Trezzo sull'Adda in Lombardy, Italy, spanning the Adda river. Completed in 1377, the single-arch bridge held the record for the largest span for over four hundred years, until the beginnings of the Industrial Age, while it was not until the early 20th century that masonry bridges with larger openings were constructed. History The Trezzo Bridge was built between 1370 and 1377 by order of the lord of Milan Bernabò Visconti. Fortified with towers, it provided access to the Visconti Castle high above the Adda. During a siege in 1416, the condottiero Carmagnola deliberately caused the structure to collapse by weakening one of its abutments. Its single arch featured a span of , according to other sources even as much as . By comparison, the second largest pre-industrial bridge vault, the French Pont de Vieille-Brioude, spans . The rise of the segmental arch was ca. , with a span-to-rise ratio of 3.3:1. The arch ri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adda (river)
The Adda (Latin ''Abdua'', or ''Addua''; in Lombard ''Ada'' or, again, ''Adda'' in local dialects where the double consonants are marked) is a river in North Italy, a tributary of the Po. It rises in the Alps near the border with Switzerland and flows through Lake Como. The Adda joins the Po a few kilometres upstream of Cremona. It is long. The highest point of the drainage basin is the summit of la Spedla (a subpeak of Piz Bernina), at . Towns along the river Adda include Bormio, Tirano, Sondrio, Bellagio and Lecco (both on Lake Como), Brivio and Lodi. Course The Adda's true source is in Alpisella valley near the head of the Fraele glen, but its volume is increased by the union with several smaller streams, near the town of Bormio, at the Rhaetian Alps. Thence it flows first southwest, then due west, through the fertile Valtellina, passing Tirano, where the Poschiavino falls in on the right bank, and Sondrio, where the Mallero joins, also on the right. This first h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
