Nahh It can't be 1302, It could be really really late 1700 or early 1800 .
1302 ??? that's very impossibale, Pha Chao Fah Ngum ruled in 1353-1373...
According to what I've read, the first groups of Europeans arriving in Lan Xang Kongdom from the reign of Pha Chao Souliya Vongsa 1637-1694.
Those people were traders and Missionaries,
The first trader was a Dutch merchant, Gerrit Van Wuysthoff, Arrived in 1641 and left soon thereafter because he saw a little prospects of either economic advantage or Christian converts.
The first Missionaries was a Jesuit Father Giovanni Maria Leria, and He stayed only five years before despairing of success in his missionary work.
As for argument for Camera ! we didn't know exactly when Camera was invented, some said Mid 1700, some said late or early 1800. But anyways.....
you got my support 99 percent bro, I was really thinking that our Kingdom exposed to the outside world really happened during the French came in in Mid 1800, but completed colonies laos in lated 1800.