The city's waterfront district, along the Allegheny and Ohio rivers, became Pittsburgh's North Shore neighborhood.

Prior to the 1850s, most of the area was still largely farmland, but was subdivided into residential lots, first for the growing German population and later for Croat immigrants.

[1] The annexation of Allegheny by Pittsburgh began with voting in favor of a "Greater Pittsburg" in a special election held on June 12, 1906[2] and was effected on December 9, 1907,[3][4] in the wake of the U.S. Supreme Court's landmark decision Hunter v. City of Pittsburgh handed down on November 19 that year.

The annexation was controversial at the time, as an overwhelming majority of Allegheny City residents were opposed to the merger.

Previous Pennsylvania law had directed that a majority of the voters in each merging municipality had to approve an annexation agreement.

In 1906, the State Assembly passed a new law that authorized annexations if a majority of the total voters in both combined municipalities approved the merger.

Heyl & Patterson Inc., a manufacturer of railcar dumpers and ship unloaders, also established a factory in Allegheny City.

By the middle of the 19th century, the "Made in Allegheny" label could be found not only on basic iron but on rope, plows, cotton cloth, wool, food, paper, paint, steam engines, wagons and carts, meat, soap, candles, lumber, linseed oil, furniture and a host of other diversified products.

[7][8] The Teutonia Männerchor Hall in the East Allegheny (Deutschtown) neighborhood of Pittsburgh, Pennsylvania, is a building constructed in 1888.

The Teutonia Männerchor is a private membership club with the purpose of furthering choral singing, German cultural traditions and good fellowship.

The club features a number of heritage activities and celebrations, including choral singing in German and folk dancing.

The Priory is the name for two historic landmarks – the 1852 St. Mary's German Catholic Church and the adjacent 1888 home for Bavarian Benedictine priests and brothers.

The "tied house" (brewery owned restaurant) features a full German menu and live music.