ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )

ANKARA, TURKIYE - OCTOBER 20: A view from the PTT Stamp Museum, where Turkiye's Post and Telegraph Organization (PTT), which has marked 185 years in the country's communication history, preserves rare stamps under special security and climate-controlled conditions on October 20, 2025 in Ulus neighborhood of Ankara, Turkiye. The museum holds thousands of stamps documenting the period from the Ottoman Empire to the Republic. The museum's archive includes stamps from all periods dating back to 1864, as well as stamps received from postal administrations of countries affiliated with the Universal Postal Union (UPU). ( Osmancan Gürdoğan - Anadolu Agency )