The Pope posed and smiled for a selfie with a young Catholic in South Korea.
Pope Francis was greeted by cheers and the waving of handkerchiefs as he arrived at South Korea's Daejeon World Cup Stadium to hold a mass.
The Pontiff had his cap blown off and his robes tangled by high winds in the Vatican.
Three of Pope Francis' relatives have been killed in a car accident in Argentina, local media have reported.
The Pope's nephew Emanuel Bergoglio was seriously injured when his car collided with a truck but his wife and two children, aged two years and eight months, died in the crash, according to local police.
Local news agency DYN said the accident happened shortly after midnight when Begoglio's car slammed into the back of a truck which was carrying grains.
Vast crowds gathered in Seoul's Gwanghwamun Square in South Korea as Pope Francis delivered a beatification mass for 124 Catholic martyrs.
Beatification is the last step before sainthood in the Roman Catholic Church.
In his homily before a crowd of hundreds of thousands, Francis said the martyrs' courage and charity and their rejection of the rigid social structures of their day should be an inspiration for people today.
Pope Francis has surprised South Koreans during his visit to the country by shunning an expensive luxury car to travel in a compact car instead.
After arriving at the airport he climbed into the backseat of a a Kia Soul - the manufacturer's second smallest model.
Pope Francis has refused to use a bullet-proof "popemobile" like his predecessors in favour of low-key cars.
His choice of car has received wide coverage in South Korea, where ostentatious shows of wealth usually represent a person's status.
Pope Francis has arrived in South Korea on the first papal visit to the Asian nation in 25 years, stepping off a plane on to a red carpet and greeting the president, Catholics and grieving relatives of the recent ferry disaster.
During his five-day visit, Francis plans to beatify 124 Korean martyrs and encourage a vibrant and growing local church seen as a model for the future of Catholicism.
Two former Popes of the Roman Catholic Church are set to become saints at an unprecedented twin canonisation by Pope Francis, that has aroused both joy and controversy in the 1.2 billion member Church.
Pope John XXIII, who reigned from 1958 to 1963 and called the modernising Second Vatican Council, and Pope John Paul II, who reigned for nearly 27 years before his death in 2005, will be declared saints in a ceremony tomorrow.
While John died half a century ago, critics say the canonisation of John Paul - which sets a record for modern times of only nine years after his death - is too hasty.
Some critics also believe he was slow to grasp the seriousness of the sexual abuse crisis that emerged towards the end of his pontificate.
Barack Obama has met with the Pope at the Vatican for the first time.
The President met Pope Francis to discuss a number of issues affecting the world and the USA.
Diplomatic Correspondent John Ray's reports contains flash photography:
Former Pope Benedict made a surprise entrance into St. Peter's Basilica to attend a ceremony at which his successor, Pope Francis, was elevating 19 prelates to the high rank of cardinal.
Benedict, who resigned a year ago, sat quietly wearing a long white overcoat in the front row along with other cardinals.
It was the first time he has attended a papal ceremony since his resignation, although he and Francis have met several times.