Anaconda Smelter Stack
The Anaconda Smelter Stack is the tallest surviving masonry structure in the world, with an overall height of about 585 ft , including a brick chimney 555 ft tall and the downhill side of a concrete foundation 30 ft tall. It is a brick smoke stack or chimney, built in 1918 as part of the Washoe Smelter of the Anaconda Copper Mining Company (ACM) at Anaconda, Montana, in the United States. A terra cotta coating covered the entire brick chimney when new, but by the time the smelter closed in 1981, most had eroded away except for the upper 40%, exposing most of its bricks and reinforcing rods. The inside diameter at the bottom of the brick chimney is 76 ft while that at the top is about 60 ft . The stack and its viewing area are now the two-part Anaconda Smoke Stack State Park.
Anaconda Smelter Stack
The overall height of the stack is 585 ft (≈ 585 feet) , including a brick chimney 555 ft (≈ 555 feet) tall and the downhill side of a concrete foundation 30 ft high. This was the height when new in 1918, but loss of the terra cotta that covered the top course of bricks since then reduced its height one or more inches. The lowest 68 ft of the brick chimney is an octagon, the vertices of which point to the cardinal and intercardinal directions, north, northeast, east, etc., while its sides face the secondary-intercardinal directions, north-northeast, east-northeast, etc. Two large vertical openings are in the octagonal portion, each 12.5 x , on its east-southeast and south-southwest sides. When operational, the main flue carried hot exhaust gases to these openings and then into the stack from the smelter which was on the north side of the hill upon which the stack rests. The base of the octagon was 86 ft (≈ 86 feet) side to side across its bottom before the loss of its terra cotta covering. But the inner surface of the octagon is circular with an inside diameter of 76 ft (≈ 75 feet) across its bottom. The wall thickness of the octagon at its bottom ranges from 64 in (≈ 6 feet) at the center of a side to 102 in at each vertex. The rest of the chimney is a slightly tapering cylinder with a top inside diameter of 60 ft (≈ 60 feet) and a wall thickness of 22+1/4 in (≈ 2 feet) just below a slightly flared top. Its cylindrical portion plus the top 5 ft of the octagon are encircled by many large steel rods (called bands) for reinforcement. It has had 20 lightning rods around its rim since it was built (which are not included in its height). The stack contains 2,464,652 locally manufactured perforated tile bricks, each averaging 2.7 times larger by volume than the size of a normal brick. 
St. Martin's Church, Landshut
The Church of St. Martin in Landshut is a medieval church in the German city located in the state of Bavaria. St. Martin's Church, along with Trausnitz Castle and the celebration of the Landshuter Hochzeit (wedding), are the most important landmarks and historical events of Landshut. This Brick Gothic landmark is the tallest church in Bavaria, and the tallest brick building as well as church in the world. It is also the 2nd tallest brick structure in the world (after Anaconda Smelter Stack), made without steel supports. St. Martin's church has a height of 130.6 m .

Question: The Church of St. Martin in Landshut is a medieval church in the German city located in the state of Bavaria, it is also the 2nd tallest brick structure in the world (after Anaconda Smelter Stack), made without steel supports, the Anaconda Smelter Stack is a brick smoke stack, once part of the smelter of which organization, at Anaconda, Montana in the United States?
Answer: Anaconda Copper Mining Company