Question: Which was built first, the Theodosius Cistern or the German Fountain?

Context paragraphs:
14th Street (IRT Third Avenue Line): 14th Street was a local station on New York's demolished IRT Third Avenue Line.  It had two levels.  The lower level was served by local trains and had two tracks and two side platforms.  It was built first.  The upper level was built as part of the Dual Contracts and had one track that bypassed the station and served express trains.  In 1924, the Brooklyn–Manhattan Transit Corporation built the 14th Street-Eastern District Line Subway below the station, which included the Third Avenue subway station.  Although this station was located above the Third Avenue BMT subway station on what is today known as the BMT Canarsie Line, the two stations were never connected.  This station closed on May 12, 1955, with the ending of all service on the Third Avenue El south of 149th Street.

76th Street (IRT Third Avenue Line): 76th Street was a local station on the demolished IRT Third Avenue Line in New York City.  It was originally built on December 9, 1878, and had two levels.  The lower level was built first and served local trains.  It had two tracks and two side platforms.  The upper level was built as part of the Dual Contracts and had one track for express trains.  This station closed on May 12, 1955, with the ending of all service on the Third Avenue El south of 149th Street.

84th Street (IRT Third Avenue Line): 84th Street was a local station on the demolished IRT Third Avenue Line.  It was originally built on December 9, 1878, and had two levels.  The lower level was built first and had two tracks and two side platforms.  It was served by local trains.  The upper level was built as part of the Dual Contracts and had one track that bypassed the station for express trains.  This station closed on May 12, 1955, with the ending of all service on the Third Avenue El south of 149th Street.

German Fountain: The German Fountain (Turkish: "Alman Çeşmesi" German: "Deutscher Brunnen" ) is a gazebo styled fountain in the northern end of old hippodrome (Sultanahmet Square), Istanbul, Turkey and across from the Mausoleum of Sultan Ahmed I.  It was constructed to commemorate the second anniversary of German Emperor Wilhelm II's visit to Istanbul in 1898.  It was built in Germany, then transported piece by piece and assembled in its current site in 1900.  The neo-Byzantine style fountain's octagonal dome has eight marble columns, and dome's interior is covered with golden mosaics.

59th Street (IRT Third Avenue Line): 59th Street was a local station on the demolished IRT Third Avenue Line.  It was built on September 16, 1878, and had two levels.  The lower level was served by local trains and had two tracks and two side platforms.  It was built first.  The upper level was built as part of the Dual Contracts and had one track for express trains.  Due to its location along the east side of the headquarters for Bloomingdale's, the station was also known as "Bloomingdale's Station."  The station was also the first rapid transit stop in the city to have an escalator, installed in September 1901.  This station closed on May 12, 1955, with the ending of all service on the Third Avenue El south of 149th Street.

Lamy (disambiguation): Lamy is a German fountain pen brand and producer.

Roman Baths, Strand Lane: The Strand Lane Baths, at 5 Strand Lane, London WC2R 2NA, have been reputed since the 1830s to be a Roman survival.  They are in fact the remaining portion of a cistern built in 1612 to feed a fountain in the gardens of the old Somerset House, then a royal place.  After a long period of neglect and decay, following the demolition of the fountain, they were brought back into use in the 1770s as a public cold plunge bath, attached to No 33 Surrey Street.  The idea that they were Roman probably began some fifty years later as an advertising gimmick, and has aroused both enthusiasm and scepticism ever since.

Hard Lodging: Hard Lodging is a historic home located at Union Bridge, Carroll County, Maryland, United States.  It is built on a small cliff overlooking the site where its first owner, Solomon Shepherd, had a mill that is no longer standing.  The house was built in three stages: the middle section, a 2 ⁄ -story brick structure, was probably built first; the main section of the house is attached to the west and is a Federal-style, three-by-two-bay, 2 ⁄ -story house with an interior gable-end chimney.  Hard Lodging is currently a private residence and is no longer owned by the Historical Society.  The home is an example of Pennsylvania German architecture.

Theodosius Cistern: The Theodosius Cistern (Greek: Κινστέρνα Θεοδοσίου , Turkish: Şerefiye Sarnıcı ) is one of many ancient cisterns of Constantinople that lie beneath the city of Istanbul, Turkey.  The modern entrance is in Piyer Loti Caddesi, Fatih.

30th Street (IRT Ninth Avenue Line): 30th Street was a local station on the demolished IRT Ninth Avenue Line.  It was opened on December 13, 1873 as the replacement for the original northern terminus of the Ninth Avenue Line at 29th Street, which was built in 1868 The station which was originally built by the New York Elevated Railroad Company had two levels.  The lower level was built first and had two tracks and two side platforms.  The upper level was built as part of the Dual Contracts and had one track that served express trains that bypassed the station.  It closed on June 11, 1940.  The next southbound stop was 23rd Street.  The next northbound stop was 34th Street.

Supporting paragraphs: Theodosius Cistern German Fountain
Answer: Theodosius Cistern