The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "symbol" appeared
2017-04-04 : Address to mark the launch of the new €50 banknote2015-03-18 : Speech at the inauguration of the New ECB Premises
2015-02-24 : Unveiling of the new €20 banknote
2013-05-02 : Short address on the occasion of the launch of the Europa series €5 banknote