Stabilimento Tecnico Triestino
| Defunct (merged 1929) | |
| Industry | Naval and commercial shipbuilding |
| Founded | 1857 |
| Headquarters | Trieste, Austria (later Italy) |
| Services | Ship repair |
Stabilimento Tecnico Triestino (STT) ("Technical Establishment of Trieste") was a private shipbuilding company based in Trieste from the mid-19th to early 20th century, and the most important naval shipbuilding firm of the Austro-Hungarian Empire.
After World War I, Trieste was annexed by Italy and the firm built naval and commercial vessels for its new host country. STT was merged with another Italian shipbuilding firm, Cantiere Navale Triestino, in 1929 to form Cantieri Riuniti dell' Adriatico (CRDA). As CRDA Trieste, its shipyards remained active well into the postwar period, becoming part of the Fincantieri group in 1984.
Stabilimento Tecnico Triestino had its origins in a private shipyard founded by Giuseppe Tonello at San Marco, on the coastline west of Trieste, in 1838. In 1857, the shipyard was merged with a local manufacturer of marine engines to become STT. A second shipyard was also acquired, at San Rocco near the town of Muggia just south of Trieste.
STT was the largest and most important shipbuilder in the Austrian Empire and its successor state, the Austro-Hungarian Empire. The company built most of the Austro-Hungarian Navy's capital ships, as well as many merchant vessels. In the 1860s and 1870s, STT built five of the Austro-Hungarian Navy's seven centre-battery ships (a forerunner of the battleship), as well as a number of ironclads, cruisers, frigates and corvettes. Between 1884 and 1914, the company built 13 of the Austro-Hungarian Navy's 16 battleships, including all three battleships of the Habsburg class, all three of the Radetzky class, and three of the four Tegetthoff class. It also built the three coastal defence battleships of the Monarch class.
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