This museum, set within a lovely backstreet garden, documents the history of the telephone in Hungary since 1881, when the world’s first switchboard – a Rotary 7A1, still working and the centrepiece of the exhibition – was set up in Budapest. Other exhibits pay tribute to Tivadar Puskás, a Hungarian associate of Thomas Edison, and cover the latter’s fleeting visit to Budapest in 1891. Enter from Országház utca 30 at the weekend.