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Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.

The Beatles ' rooftop concert was the final public performance of the English rock band the Beatles . On 30 January 1969 , the band , with keyboardist Billy Preston , surprised a central London office and fashion district with an impromptu concert from the roof of the headquarters of the band 's multimedia corporation Apple Corps at 3 Savile Row . In a 42 - minute set , the Beatles were heard playing nine takes of five songs before the Metropolitan Police Service asked them to reduce the volume . Footage from the performance was later used in the 1970 documentary film Let It Be .

Solution: The Beatles' rooftop concert
Why? 'The answer given is correct because it is an appropriate title as it is the main subject of the passage.

New input: The design of the Eiffel Tower was the product of Maurice Koechlin and Emile Nouguier , two senior engineers working for the Compagnie des Etablissements Eiffel , after discussion about a suitable centrepiece for the proposed 1889 Exposition Universelle , a world 's fair to celebrate the centennial of the French Revolution . Eiffel openly acknowledged that inspiration for a tower came from the Latting Observatory built in New York City in 1853 . In May 1884 , working at home , Koechlin made a sketch of their idea , described by him as '' a great pylon , consisting of four lattice girders standing apart at the base and coming together at the top , joined together by metal trusses at regular intervals '' . Eiffel initially showed little enthusiasm , but he did approve further study , and the two engineers then asked Stephen Sauvestre , the head of company 's architectural department , to contribute to the design . Sauvestre added decorative arches to the base of the tower , a glass pavilion to the first level , and other embellishments .
Solution:
Eiffel Tower