Siam Memorial & Some Events Part#1

I don't know to write something, Today I write about my country for present but I tell about the old day. In the old day people in Thailand call we country "Siam" because the location to look like an ax. In the past when Thai people saw foreigner, they must to smile and friendly. So, Thailand to call once more is "Smile Siam country".
I'm guideline for back ground of Thailand. Thailand is geographically located in the heart of South-East Asia. Adjoining to Lao People's Democratic Republic to North and North-East. The union of Myanmar to the North and West, Cambodia to the East, the Gulf of Thailand to South-East, Andaman Sea to South-West and Malaysia to the South. The area approximately 513,000 esq. The capital name is Bangkok. The population approximately 63 million. Buddhism is the national religion. The King is a Buddhist and upholder of all religions. The main language is Thai but English is generally understood particularly in Bangkok and other major cities. The currency is Baht. Exchange rate is approximately 35-40 Baht to 1 US dollar. Ummm...I ask to you for 1Question. Why the capital city of Thailand when call for English is "Bangkok".