From Ban Chiang and Dvaravati through Sukhothai, Ayutthaya, Thonburi and Bangkok to constitutional government — with the World Heritage sites you can still walk through, what they cost to enter, and the anniversaries that close the banks.
Last verified 20 Sep 2026 against page facts re-read that day, as recorded in the explore-depth rotation log
Four of the six sit before Sukhothai, which is the part of the story most short timelines skip. Thailand also holds three natural properties — Thungyai-Huai Kha Khaeng Wildlife Sanctuaries (1991), Dong Phayayen-Khao Yai Forest Complex (2005) and Kaeng Krachan Forest Complex (2021) — covered on the national parks guide.
State historical parks and national museums price entry separately for Thai nationals and other nationalities. Both figures are printed below because printing only one would misdescribe the gate. Every figure here comes from the Fine Arts Department's own pages, read on 20 September 2026.
Six of Thailand's public holidays are historical or royal anniversaries rather than religious or seasonal ones. Dates and official English names below are the Bank of Thailand's financial-institutions holiday list for 2026 — the banking calendar. Government offices follow the Cabinet's own list, usually the same but not automatically so. If you are timing a title transfer, a bank appointment or an immigration visit, these are the days to route around.
Songkran, Makha Bucha, Visakha Bucha and Asarnha Bucha are also public holidays; they move with the lunar calendar and belong to the culture guide rather than this timeline.
It depends what you are counting. The Kingdom of Sukhothai, treated as the first Siamese kingdom, dates from about 1238; the present Chakri dynasty and the capital at Bangkok date from 1782; and constitutional government dates from 24 June 1932. Human settlement is far older — the mound at Ban Chiang in Udon Thani was occupied continuously from 1495 BC. The name itself is recent: the country adopted Thailand in 1939, briefly reverted to Siam after the Second World War, and restored Thailand in 1949.
No European power ruled Siam as a colony. It did lose territory: through nineteenth and early twentieth century treaties with France and Britain, Siam ceded outlying provinces while retaining sovereignty, sitting as a buffer between French Indochina and British possessions. Treating that as either full independence or quiet colonisation overstates the case in opposite directions, and serious accounts of the period disagree about how much room Bangkok actually had.
Six cultural properties: the Historic Town of Sukhothai and Associated Historic Towns (1991), the Historic City of Ayutthaya (1991), the Ban Chiang Archaeological Site (1992), the Ancient Town of Si Thep and its Associated Dvaravati Monuments (2023), Phu Phrabat (2024), and Wat Phra Mahathat Woramahawihan in Nakhon Si Thammarat (2026). There are also three natural properties: Thungyai-Huai Kha Khaeng Wildlife Sanctuaries (1991), Dong Phayayen-Khao Yai Forest Complex (2005) and Kaeng Krachan Forest Complex (2021).
At Sukhothai Historical Park the Fine Arts Department publishes 20 THB for Thai nationality and 100 THB for other nationalities, with separate vehicle charges of 10 THB for a bicycle up to 50 THB for a car, and free entry for students with ID, clergy and visitors aged 60 and over. Si Satchanalai is the same 20 and 100 THB. At Ayutthaya, entry is charged per monument at 10 THB for Thai visitors and 50 THB for foreign visitors, or a combined ticket at 40 and 220 THB covering six temples. State parks and national museums in Thailand price entry separately for Thai nationals and other nationalities, and the rates are set by announcement and change, so confirm at the gate.
At the Bangkok National Museum in Phra Nakhon, open 09.00 to 16.00 and closed Mondays, Tuesdays and holidays, with admission of 30 THB for Thai visitors and 200 THB for foreign visitors. The stone is dated 1292 and was added to UNESCO's Memory of the World Register in 2003. Scholars still debate parts of its interpretation and dating, which is worth knowing before you read the label.
On the 2026 banking calendar: Chakri Memorial Day on 6 April, Coronation Day on 4 May, King Bhumibol Adulyadej the Great Memorial Day on 13 October, King Chulalongkorn the Great Memorial Day on 23 October, the 7 December substitution for King Bhumibol's 5 December birthday, which is also National Day and Father's Day, and Constitution Day on 10 December. Banks and most government offices close on these days, which matters if you are timing a property transfer or a visa appointment.
Thai government documents count years in the Buddhist Era, which runs 543 years ahead of the Common Era — the Royal Thai Embassy's official holiday notice for 2026 is headed B.E. 2569. You will meet Buddhist Era dates on title deeds, lease documents, visa paperwork and utility bills, so it is worth being able to convert in your head.
The Rattanakosin island in Phra Nakhon district is the 1782 city: the Grand Palace, Wat Phra Kaew and the Bangkok National Museum sit within a few hundred metres of each other, with Wat Arun across the river in Thonburi, the capital Taksin founded in 1767. Ayutthaya is roughly 80 km north and reachable as a day trip by train or road; Sukhothai is a longer trip into the lower north.
Opening hours and admission rates above were read on 2026-09-20 from the Fine Arts Department's own sites, not from a travel guide. The department did not publish opening hours for Ayutthaya Historical Park on the pages reachable that day, and that row says so rather than borrowing a figure. Park and museum rates are set by departmental announcement, are priced separately for Thai nationals and other nationalities, and change; confirm at the gate. Early Thai dates and their interpretation are disputed among historians, and this page follows the cited institutional sources rather than resolving those disputes.
Explore the neighbourhoods where this history still lives.
Dates and interpretations of early Thai history vary among scholars. This overview uses the cited institutional and official sources and avoids disputed claims where evidence is inconclusive. BAANLYY is a property and relocation platform, not a museum or a historical authority; where a site's own authority publishes a figure, that figure is what appears above.