1. Republic Square in Yerevan, Armenia is a central square in the city and a popular gathering place for locals and tourists alike. The square is known for its unique pink and white neoclassical buildings that surround it, including the Government House, the History Museum, and the Marriott Hotel. The square also features beautiful fountains, statues, and a large stone colonnade called \"The Singing Fountains\" which provides a light and music show in the evenings.

2. Republic Square is open to the public 24/7 and there is no entrance fee required to visit. For specific information or inquiries, you can contact the Yerevan Municipality at +374 10 512121.

3. Republic Square is easily accessible by public transportation including buses and the Yerevan Metro. Taxis and ride-sharing services are also readily available in the area for transportation convenience. There are no tickets needed to visit Republic Square, making it a popular and free destination for locals and tourists to enjoy.