Security and style came to Tenleytown in 1900, when Engine House No. 20 opened across from Wisconsin Avenue, ending the need for firefighters to come from Georgetown to extinguish blazes in Tenleytown's wood-frame houses. Opened with horse-drawn equipment, Engine House 20 became the District's second motorized fire station, and the modern firehouse reassured builders and buyers that Tenleytown was a good investment. Recent improvements to the firehouse harmonize with its original handsome Italianate design by Leon Dessez. The 1907 Art Deco style C&P Telephone Company Exchange Building to its left was designed by Eidlitz and McKenzie, better known for No. 1 Times Square, where each December 31 a lighted crystal ball drops to mark the New Year. The first enterprise to occupy the 4200 block of Wisconsin Avenue was Raymond T. Johnson, Sr.'s Wisconsin Avenue Market. Shortly after the grocery opened in 1932, Johnson agreed to sell a few of his neighbor's geraniums, and from these humble beginnings grew Johnson's Flower Center. At 4321 Wisconsin Avenue is the Friendship Building, Tenleytown's first office building; its second-floor dance studio was the 1944 birthplace of the Washington School of Ballet. Nearby, on the corner of 39th Street and Windom Place, is the Rest, Tenleytown's oldest surviving house, dating to the early 1800s, the centerpiece of Armesleigh Park's quiet blocks, where a variety of houses with rough stone chimneys and generous porches were designed by prolific local architects George Santmyers or Alexander Sonnermann.