Question: Where did the Hershey Company's founder build a historical landmark?

Context paragraphs:
Hershey Trust Company: The Hershey Trust Company is a United States corporation incorporated on April 28, 1905, by Milton S. Hershey, Harry Lebkicher and John E. Snyder.  The company is majority owner of The Hershey Company and sole private owner of Hershey Entertainment and Resorts Company and administrator of the 2,000 student Milton Hershey School.  It manages about $12.3 billion in charitable funds.

Hershey's Drops: Hershey's Drops are circular-shaped chocolate candies produced by The Hershey Company, launched on December 1, 2010.  There are two variants available: Hershey's Milk Chocolate Drops and Hershey's Cookies ‘n’ Cream Drops, the former based on the traditional Hershey’s Milk Chocolate bar and the latter based on the popular Cookies ‘n’ Creme-flavoured variant.  While similarly shaped, Hershey’s Drops lack the hard candy shell found on M&M's and similar candies.  They originated in the United States and have since become common internationally in countries such as Canada and China.  In the United States, the candies are available in resealable containers, and in China the candies are available wrapped in plastic packets within cardboard containers sealed with a plastic lid.

The Hershey Company: The Hershey Company, known until April 2005 as the Hershey Foods Corporation and commonly called Hershey's, is an American company and one of the largest chocolate manufacturers in the world.  Its headquarters are in Hershey, Pennsylvania, which is also home to Hershey's Chocolate World.  It was founded by Milton S. Hershey in 1894 as the Hershey Chocolate Company, a subsidiary of his Lancaster Caramel Company.  Hershey's products are sold in over 60 countries worldwide.  In addition, Hershey is a member of the World Cocoa Foundation.  It is also associated with the Hersheypark Stadium and the Giant Center.

Mr. Goodbar: Mr. Goodbar is a candy bar containing common peanuts and chocolate, whose packaging is identifiable by its yellow background and red text.  It is manufactured by The Hershey Company and was introduced in 1925.  Although the Hershey Milk Chocolate Bar with Almonds had been produced since 1908, Milton Hershey initially did not want the Hershey brand name associated with a chocolate bar that contained peanuts, so it was introduced as being produced by the "Chocolate Sales Corporation" (a fictitious company name created by William Murrie).  It is currently available both as an individual product and as one of the varieties of Hershey's Miniatures.

Milton S. Hershey: Milton Snavely Hershey (September 13, 1857 – October 13, 1945) was an American confectioner and philanthropist.  He founded the Hershey Chocolate Company and the "company town" of Hershey, Pennsylvania, eventually becoming a great success.  As he and his wife had no children, they turned to philanthropy.

Pennsylvania Route 39: Pennsylvania Route 39 (PA 39) is a 17.83 mi state highway located in Dauphin County, Pennsylvania, United States.  PA 39 begins at North Front Street near Harrisburg and ends at U.S. Route 322 and U.S. Route 422 near Hummelstown and Hershey.  The route passes through the northern and eastern suburbs of Harrisburg and passes by Hersheypark, Giant Center, as well as the primary production factory for The Hershey Company.  Between Harrisburg and Manada Hill, it is known as Linglestown Road, from Manada Hill to Hershey as Hershey Road and from Hershey to near Hummelstown and Hershey as Hersheypark Drive.  Prior to the establishment of PA 39 in 1937, PA 39, had previously been designated as a route in northeastern Pennsylvania during the 1920s.  That designation was deleted when it was renumbered US 11.  As a result, PA 39 is one of a few routes which has a set of child routes which are no where near the primary route.

Milton Hershey School: The Milton Hershey School is a private philanthropic (pre-K through 12) boarding school in Hershey, Pennsylvania.  Originally named the Hershey Industrial School, the institution was founded and funded by chocolate industrialist Milton Snavely Hershey and his wife, Catherine Sweeney Hershey.  The school was originally established for impoverished, healthy, Caucasian, male orphans, while today it serves students of various backgrounds.  The Milton Hershey School Trust, which funds the school, owns controlling interest in The Hershey Company and owns the Hershey Entertainment and Resorts Company (HE&R) which oversees many of the area hotels along with a theme park called Hersheypark.  With over twelve billion dollars in assets,} the Milton Hershey School is one of the wealthiest schools in the world.  The school is overseen by a Board of Managers.

Hershey Creamery Company: Hershey Creamery Company, also known as Hershey's Ice Cream, is a creamery that produces Hershey's brand ice cream, sorbet, sherbet, and frozen yogurt, and other frozen treats such as smoothies and frozen slab style ice cream mixers.  Founded by Jacob Hershey and four of his brothers in 1894 (all of whom have no relation to Milton S. Hershey and the chocolate company that he founded, also in 1894), it was taken over by the Holder family in the 1920s.  The company was one of the first to offer consumers pre-packaged ice cream pints.  In 1998, it modernized its operations to increase efficiency and reduce overhead.  With their shared names and cities of origin, Hershey Creamery and Hershey Company have had a tumultuous relationship marked by multiple lawsuits over trademark issues.  In the mid-1990s, the companies settled their most recent legal battles out of court, with the creamery agreeing to add a disclaimer to its ice cream products to note that it is not affiliated with The Hershey Company.

Hershey bar: The Hershey's Milk Chocolate Bar (commonly called the Hershey's Bar) is the flagship chocolate bar manufactured by the Hershey Company.  It is often referred by Hershey as "The Great American Chocolate Bar."  The Hershey Milk Chocolate Bar was first sold in 1900, followed by the Hershey's Milk Chocolate with Almonds variety, which began production in 1908.

Derry Session House and Enclosure: Derry Session House and Enclosure is a historic site located on the grounds of Derry Presbyterian Church at Derry Township, Dauphin County, Pennsylvania.  It consists of the log Session House, built about 1732, and a glass enclosure, erected in 1929.  The hewn log Session House measures 18 feet by 13 feet and is one story high and was built for a Presbyterian session.  The glass and steel enclosure measures approximately 24 feet by 19 feet, 6 inches, and sits on a reinforced concrete foundation.  The Enclosure, whose construction was originally funded by Milton S. Hershey, was refurbished in 1999.

Supporting paragraphs: Derry Session House and Enclosure Milton S. Hershey
Answer: Derry Township, Dauphin County, Pennsylvania