The Holy See Press Office announces two press conferences: on Wednesday 10 September at 10.30 the presentation of the conference "The 21st century: a new age of martyrs?", with Cardinal Marcello Semeraro, Msgr Fabio Fabene and Prof. Andrea Riccardi; on Friday 11 September at 13.00 the presentation of the IV Synodal Meeting "Fratelli tutti: North-South socio-environmental dialogue" (10-12 September, Generalate of the Brothers of the Christian Schools), with Cardinal Jaime Spengler and other speakers.