[1] The building was built in 1887 at the Gardens of Alderdi-Eder of San Sebastián, next to the Nautical Royal Club, to house the main casino.

Until then, the City Hall was located in Constitution Square (Parte Vieja), now headquarters of the Municipal Library.

Although lacking absolute majority, candidate of the Basque Nationalist Party (PNV) Jesús María Alkain prevailed for Mayor.

However, San Sebastián became a stronghold of PNV's splinter party Eusko Alkartasuna, with its candidate making it to office at the next election (1987).

They formed a minority coalition government with Euskadiko Ezkerra, which allowed it to remain as mayor during the term 1987–1991.